Base de dados : MEDLINE
Pesquisa : B01.650.232 [Categoria DeCS]
Referências encontradas : 10 [refinar]
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  1 / 10 MEDLINE  
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[PMID]:25004359
[Au] Autor:Raven JA; Giordano M
[Ad] Endereço:Division of Plant Science, University of Dundee at the James Hutton Institute, Invergowie, Dundee DD2 5DA, UK. Electronic address: j.a.raven@dundee.ac.uk.
[Ti] Título:Algae.
[So] Source:Curr Biol;24(13):R590-5, 2014 Jul 07.
[Is] ISSN:1879-0445
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Algae frequently get a bad press. Pond slime is a problem in garden pools, algal blooms can produce toxins that incapacitate or kill animals and humans and even the term seaweed is pejorative - a weed being a plant growing in what humans consider to be the wrong place. Positive aspects of algae are generally less newsworthy - they are the basis of marine food webs, supporting fisheries and charismatic marine megafauna from albatrosses to whales, as well as consuming carbon dioxide and producing oxygen. Here we consider what algae are, their diversity in terms of evolutionary origin, size, shape and life cycles, and their role in the natural environment and in human affairs.
[Mh] Termos MeSH primário: Biodiversidade
Clorófitas/fisiologia
Cianobactérias/fisiologia
Eucariotos/fisiologia
Glaucófitas/fisiologia
Rodófitas/fisiologia
Simbiose/fisiologia
[Mh] Termos MeSH secundário: Apicomplexa/genética
Apicomplexa/fisiologia
Carofíceas/genética
Carofíceas/fisiologia
Clorófitas/classificação
Clorófitas/genética
Criptófitas/genética
Criptófitas/fisiologia
Cianobactérias/classificação
Cianobactérias/genética
Dinoflagelados/genética
Dinoflagelados/fisiologia
Eucariotos/classificação
Eucariotos/genética
Glaucófitas/classificação
Glaucófitas/genética
Haptófitas/genética
Haptófitas/fisiologia
Reprodução/fisiologia
Rhizaria/genética
Rhizaria/fisiologia
Rodófitas/classificação
Rodófitas/genética
Estramenópilas/genética
Estramenópilas/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1503
[Cu] Atualização por classe:140709
[Lr] Data última revisão:
140709
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140709
[St] Status:MEDLINE


  2 / 10 MEDLINE  
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[PMID]:24715730
[Au] Autor:Forest KT
[Ad] Endereço:Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706.
[Ti] Título:Vivid watercolor paintbox for eukaryotic algae.
[So] Source:Proc Natl Acad Sci U S A;111(15):5448-9, 2014 Apr 15.
[Is] ISSN:1091-6490
[Cp] País de publicação:United States
[La] Idioma:eng
[Mh] Termos MeSH primário: Clorófitas/genética
Glaucófitas/genética
Luz
Fitocromo/genética
Fitocromo/fisiologia
Estramenópilas/genética
[Pt] Tipo de publicação:COMMENT; JOURNAL ARTICLE
[Nm] Nome de substância:
11121-56-5 (Phytochrome)
[Em] Mês de entrada:1406
[Cu] Atualização por classe:150806
[Lr] Data última revisão:
150806
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140410
[St] Status:MEDLINE
[do] DOI:10.1073/pnas.1403530111


  3 / 10 MEDLINE  
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[PMID]:24680917
[Au] Autor:Chong J; Jackson C; Kim JI; Yoon HS; Reyes-Prieto A
[Ad] Endereço:Department of Biology, University of New Brunswick, 10 Bailey Drive, Fredericton, New Brunswick E3B 5A3, Canada; Integrated Microbiology Program, Canadian Institute for Advanced Research, Canada.
[Ti] Título:Molecular markers from different genomic compartments reveal cryptic diversity within glaucophyte species.
[So] Source:Mol Phylogenet Evol;76:181-8, 2014 Jul.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Glaucophytes are the least studied of the three major Archaeplastida (Plantae sensu lato) lineages. It has been largely recognized that comprehensive investigations of glaucophyte genetic and species diversity will shed light on the early evolution of photosynthetic eukaryotes. Here we used molecular phylogenetics and genetic distance estimations of diverse molecular markers to explore strain and species diversity within the glaucophyte genera Cyanophora and Glaucocystis. Single gene and concatenated maximum likelihood analyses of markers from three different genetic compartments consistently recovered similar intrageneric genetic groups. Distance analyses of plastid (psbA and rbcL) and mitochondrial (cob and cox1) genes, and the nuclear internal transcribed spacer (ITS) region, revealed substantial genetic divergence between some Cyanophora paradoxa and Glaucocystis nostochinearum strains. The genetic distances estimated between some glaucophyte strains currently considered the same species are similar or greater than divergence values calculated between different species in other unicellular algae, such as certain green algae and diatoms. The analyzed molecular markers are prospective candidates for future studies of species diversity in glaucophytes. Overall, our results unveil previously unrecognized cryptic diversity within Cyanophora and Glaucocystis species.
[Mh] Termos MeSH primário: Cyanophora/genética
Variação Genética/genética
Genoma/genética
Glaucófitas/genética
Filogenia
[Mh] Termos MeSH secundário: Núcleo Celular/genética
Clorófitas/genética
Cyanophora/citologia
Código de Barras de DNA Taxonômico
Diatomáceas/genética
Marcadores Genéticos/genética
Genômica
Glaucófitas/citologia
Coreia (Geográfico)
Mitocôndrias/genética
América do Norte
Plastídeos/genética
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Genetic Markers)
[Em] Mês de entrada:1501
[Cu] Atualização por classe:140526
[Lr] Data última revisão:
140526
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140401
[St] Status:MEDLINE


  4 / 10 MEDLINE  
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[PMID]:24602296
[Au] Autor:Miyagishima SY; Kabeya Y; Sugita C; Sugita M; Fujiwara T
[Ad] Endereço:Center for Frontier Research, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan. smiyagis@nig.ac.jp.
[Ti] Título:DipM is required for peptidoglycan hydrolysis during chloroplast division.
[So] Source:BMC Plant Biol;14:57, 2014 Mar 06.
[Is] ISSN:1471-2229
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Chloroplasts have evolved from a cyanobacterial endosymbiont and their continuity has been maintained over time by chloroplast division, a process which is performed by the constriction of a ring-like division complex at the division site. The division complex has retained certain components of the cyanobacterial division complex, which function inside the chloroplast. It also contains components developed by the host cell, which function outside of the chloroplast and are believed to generate constrictive force from the cytosolic side, at least in red algae and Viridiplantae. In contrast to the chloroplasts in these lineages, those in glaucophyte algae possess a peptidoglycan layer between the two envelope membranes, as do cyanobacteria. RESULTS: In this study, we show that chloroplast division in the glaucophyte C. paradoxa does not involve any known chloroplast division proteins of the host eukaryotic origin, but rather, peptidoglycan spitting and probably the outer envelope division process rely on peptidoglycan hydrolyzing activity at the division site by the DipM protein, as in cyanobacterial cell division. In addition, we found that DipM is required for normal chloroplast division in the moss Physcomitrella patens. CONCLUSIONS: These results suggest that the regulation of peptidoglycan splitting was essential for chloroplast division in the early evolution of chloroplasts and this activity is likely still involved in chloroplast division in Viridiplantae.
[Mh] Termos MeSH primário: Cloroplastos/metabolismo
Glaucófitas/metabolismo
Peptidoglicano/metabolismo
Proteínas de Plantas/metabolismo
[Mh] Termos MeSH secundário: Hidrólise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Peptidoglycan); 0 (Plant Proteins)
[Em] Mês de entrada:1409
[Cu] Atualização por classe:150515
[Lr] Data última revisão:
150515
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140308
[St] Status:MEDLINE
[do] DOI:10.1186/1471-2229-14-57


  5 / 10 MEDLINE  
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[PMID]:24567382
[Au] Autor:Rockwell NC; Duanmu D; Martin SS; Bachy C; Price DC; Bhattacharya D; Worden AZ; Lagarias JC
[Ad] Endereço:Department of Molecular and Cellular Biology, University of California, Davis, CA 95616.
[Ti] Título:Eukaryotic algal phytochromes span the visible spectrum.
[So] Source:Proc Natl Acad Sci U S A;111(10):3871-6, 2014 Mar 11.
[Is] ISSN:1091-6490
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Plant phytochromes are photoswitchable red/far-red photoreceptors that allow competition with neighboring plants for photosynthetically active red light. In aquatic environments, red and far-red light are rapidly attenuated with depth; therefore, photosynthetic species must use shorter wavelengths of light. Nevertheless, phytochrome-related proteins are found in recently sequenced genomes of many eukaryotic algae from aquatic environments. We examined the photosensory properties of seven phytochromes from diverse algae: four prasinophyte (green algal) species, the heterokont (brown algal) Ectocarpus siliculosus, and two glaucophyte species. We demonstrate that algal phytochromes are not limited to red and far-red responses. Instead, different algal phytochromes can sense orange, green, and even blue light. Characterization of these previously undescribed photosensors using CD spectroscopy supports a structurally heterogeneous chromophore in the far-red-absorbing photostate. Our study thus demonstrates that extensive spectral tuning of phytochromes has evolved in phylogenetically distinct lineages of aquatic photosynthetic eukaryotes.
[Mh] Termos MeSH primário: Clorófitas/genética
Glaucófitas/genética
Luz
Fitocromo/genética
Fitocromo/fisiologia
Estramenópilas/genética
[Mh] Termos MeSH secundário: Sequência de Bases
Ciclo do Carbono
Clorófitas/metabolismo
Dicroísmo Circular
Glaucófitas/metabolismo
Dados de Sequência Molecular
Conformação Proteica
Análise de Sequência de DNA
Estramenópilas/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
11121-56-5 (Phytochrome)
[Em] Mês de entrada:1405
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140226
[St] Status:MEDLINE
[do] DOI:10.1073/pnas.1401871111


  6 / 10 MEDLINE  
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[PMID]:24126104
[Au] Autor:Facchinelli F; Colleoni C; Ball SG; Weber AP
[Ad] Endereço:Institute for Plant Biochemistry, Cluster of Excellence on Plant Sciences (CEPLAS), Heinrich-Heine-University, Universitätsstrasse 1, D-40225 Düsseldorf, Germany.
[Ti] Título:Chlamydia, cyanobiont, or host: who was on top in the ménage à trois?
[So] Source:Trends Plant Sci;18(12):673-9, 2013 Dec.
[Is] ISSN:1878-4372
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The endosymbiont hypothesis proposes that photosynthate from the cyanobiont was exported to the cytosol of the eukaryote host and polymerized from ADP-glucose into glycogen. Chlamydia-like pathogens are the second major source of foreign genes in Archaeplastida, suggesting that these obligate intracellular pathogens had a significant role during the establishment of endosymbiosis, likely through facilitating the metabolic integration between the endosymbiont and the eukaryotic host. In this opinion article, we propose that a hexose phosphate transporter of chlamydial origin was the first transporter responsible for exporting photosynthate out of the cyanobiont. This connection pre-dates the recruitment of the host-derived carbon translocators on the plastid inner membranes of green and red algae, land plants, and photosynthetic organisms of higher order endosymbiotic origin.
[Mh] Termos MeSH primário: Chlamydia/genética
Cianobactérias/metabolismo
Rodófitas/genética
[Mh] Termos MeSH secundário: Chlamydia/metabolismo
Cianobactérias/genética
Glaucófitas/genética
Glaucófitas/metabolismo
Glaucófitas/microbiologia
Glicogênio/metabolismo
Plastídeos/genética
Plastídeos/metabolismo
Rodófitas/metabolismo
Rodófitas/microbiologia
Simbiose
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
9005-79-2 (Glycogen)
[Em] Mês de entrada:1407
[Cu] Atualização por classe:131203
[Lr] Data última revisão:
131203
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:131016
[St] Status:MEDLINE


  7 / 10 MEDLINE  
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[PMID]:22490821
[Au] Autor:Miyagishima SY; Suzuki K; Okazaki K; Kabeya Y
[Ad] Endereço:Center for Frontier Research, National Institute of Genetics, Shizuoka, Japan. smiyagis@lab.nig.ac.jp
[Ti] Título:Expression of the nucleus-encoded chloroplast division genes and proteins regulated by the algal cell cycle.
[So] Source:Mol Biol Evol;29(10):2957-70, 2012 Oct.
[Is] ISSN:1537-1719
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Chloroplasts have evolved from a cyanobacterial endosymbiont and their continuity has been maintained by chloroplast division, which is performed by the constriction of a ring-like division complex at the division site. It is believed that the synchronization of the endosymbiotic and host cell division events was a critical step in establishing a permanent endosymbiotic relationship, such as is commonly seen in existing algae. In the majority of algal species, chloroplasts divide once per specific period of the host cell division cycle. In order to understand both the regulation of the timing of chloroplast division in algal cells and how the system evolved, we examined the expression of chloroplast division genes and proteins in the cell cycle of algae containing chloroplasts of cyanobacterial primary endosymbiotic origin (glaucophyte, red, green, and streptophyte algae). The results show that the nucleus-encoded chloroplast division genes and proteins of both cyanobacterial and eukaryotic host origin are expressed specifically during the S phase, except for FtsZ in one graucophyte alga. In this glaucophyte alga, FtsZ is persistently expressed throughout the cell cycle, whereas the expression of the nucleus-encoded MinD and MinE as well as FtsZ ring formation are regulated by the phases of the cell cycle. In contrast to the nucleus-encoded division genes, it has been shown that the expression of chloroplast-encoded division genes is not regulated by the host cell cycle. The endosymbiotic gene transfer of minE and minD from the chloroplast to the nuclear genome occurred independently on multiple occasions in distinct lineages, whereas the expression of nucleus-encoded MIND and MINE is regulated by the cell cycle in all lineages examined in this study. These results suggest that the timing of chloroplast division in algal cell cycle is restricted by the cell cycle-regulated expression of some but not all of the chloroplast division genes. In addition, it is suggested that the regulation of each division-related gene was established shortly after the endosymbiotic gene transfer, and this event occurred multiple times independently in distinct genes and in distinct lineages.
[Mh] Termos MeSH primário: Proteínas de Algas/genética
Ciclo Celular/genética
Núcleo Celular/genética
Cloroplastos/genética
Eucariotos/genética
Regulação da Expressão Gênica
Genes de Cloroplastos/genética
[Mh] Termos MeSH secundário: Proteínas de Algas/metabolismo
Chlamydomonas reinhardtii/citologia
Chlamydomonas reinhardtii/genética
Cianobactérias/genética
Eucariotos/citologia
Transferência Genética Horizontal/genética
Glaucófitas/citologia
Glaucófitas/genética
Rodófitas/citologia
Rodófitas/genética
Simbiose/genética
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Algal Proteins)
[Em] Mês de entrada:1302
[Cu] Atualização por classe:120926
[Lr] Data última revisão:
120926
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:120412
[St] Status:MEDLINE


  8 / 10 MEDLINE  
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[PMID]:21640897
[Au] Autor:Delwiche CF; Timme RE
[Ad] Endereço:University of Maryland - College Park, Department of Cell Biology, College Park, MD 20742, USA. delwiche@umd.edu
[Ti] Título:Plants.
[So] Source:Curr Biol;21(11):R417-22, 2011 Jun 07.
[Is] ISSN:1879-0445
[Cp] País de publicação:England
[La] Idioma:eng
[Mh] Termos MeSH primário: Glaucófitas/classificação
Filogenia
Rodófitas/classificação
Viridiplantae/classificação
[Mh] Termos MeSH secundário: Glaucófitas/fisiologia
Fotossíntese
Plastídeos/fisiologia
Rodófitas/fisiologia
Viridiplantae/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1110
[Cu] Atualização por classe:110606
[Lr] Data última revisão:
110606
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:110607
[St] Status:MEDLINE
[do] DOI:10.1016/j.cub.2011.04.021


  9 / 10 MEDLINE  
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[PMID]:21190136
[Au] Autor:Gantt E
[Ad] Endereço:Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, 20742, USA. egantt@umd.edu
[Ti] Título:Oxygenic photosynthesis and the distribution of chloroplasts.
[So] Source:Photosynth Res;107(1):1-6, 2011 Jan.
[Is] ISSN:1573-5079
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The integrated functioning of two photosystems (I and II) whether in cyanobacteria or in chloroplasts is the outstanding sign of a common ancestral origin. Many variations on the basic theme are currently evident in oxygenic photosynthetic organisms whether they are prokaryotes, unicellular, or multicellular. By conservative estimates, oxygenic photosynthesis has been around for at least ca. 2.2-2.7 billions years, consistent with cyanobacteria-type microfossils, biomarkers, and an atmospheric rise in oxygen to less than 1.0% of the present concentration. The presumptions of chloroplast formation by the cyanobacterial uptake into a eukaryote prior to 1.6 BYa ago are confounded by assumptions of host type(s) and potential tolerance of oxygen toxicity. The attempted dating and interrelationships of particular chloroplasts in various plant or animal lineages has relied heavily on phylogenomic analysis and evaluations that have been difficult to confirm separately. Many variations occur in algal groups, involving the type and number of accessory pigments, and the number(s) of membranes (2-4) enclosing a chloroplast, which can both help and complicate inferences made about early or late origins of chloroplasts. Integration of updated phylogenomics with physiological and cytological observations remains a special challenge, but could lead to more accurate assumptions of initial and extant endosymbiotic event(s) leading toward stable chloroplast associations.
[Mh] Termos MeSH primário: Evolução Biológica
Cloroplastos/metabolismo
Cianobactérias/metabolismo
Oxigênio/metabolismo
Fotossíntese
[Mh] Termos MeSH secundário: Clorófitas/metabolismo
Cloroplastos/classificação
Cloroplastos/genética
Glaucófitas/metabolismo
Modelos Biológicos
Fotossíntese/genética
Complexo de Proteína do Fotossistema I/genética
Complexo de Proteína do Fotossistema II/genética
Rodófitas/metabolismo
Simbiose
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Photosystem I Protein Complex); 0 (Photosystem II Protein Complex); S88TT14065 (Oxygen)
[Em] Mês de entrada:1203
[Cu] Atualização por classe:171101
[Lr] Data última revisão:
171101
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:101231
[St] Status:MEDLINE
[do] DOI:10.1007/s11120-010-9605-1


  10 / 10 MEDLINE  
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[PMID]:20875864
[Au] Autor:del Campo EM; del Hoyo A; Royo C; Casano LM; Alvarez R; Barreno E
[Ad] Endereço:Department of Plant Biology, University of Alcalá, 28871-Alcalá de Henares, Madrid, Spain. eva.campo@uah.es
[Ti] Título:A single primer pair gives a specific ortholog amplicon in a wide range of Cyanobacteria and plastid-bearing organisms: applicability in inventory of reference material from collections and phylogenetic analysis.
[So] Source:Mol Phylogenet Evol;57(3):1323-8, 2010 Dec.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The scarcity of universally applied molecular markers for algae has resulted in the development of multiple, independent and not easily comparable systems. The goal of this work is to increase the number of available molecular markers and to generate easily comparable systems. Thereby, we have designed a primer pair capable of amplifying a broad range of organisms: Cyanobacteria, Chlorophyta, Chlorarachniophyta, Cryptophyta, Euglenida, Glaucophyta, Rhodophyta, Stramenopiles and Streptophyta including plants. This primer pair can amplify a portion of the 23S rRNA gene with sufficient variability to identify reference material form collections across a broad range of taxa and perform phylogenetic studies alongside other available markers.
[Mh] Termos MeSH primário: Cianobactérias/genética
Primers do DNA/genética
Plastídeos/genética
[Mh] Termos MeSH secundário: Clorófitas/classificação
Clorófitas/genética
Cianobactérias/classificação
DNA Bacteriano/genética
DNA de Plantas/genética
Glaucófitas/classificação
Glaucófitas/genética
Filogenia
RNA Ribossômico 23S/genética
Rodófitas/classificação
Rodófitas/genética
Análise de Sequência de DNA
Estramenópilas/classificação
Estramenópilas/genética
Estreptófitas/classificação
Estreptófitas/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA Primers); 0 (DNA, Bacterial); 0 (DNA, Plant); 0 (RNA, Ribosomal, 23S)
[Em] Mês de entrada:1102
[Cu] Atualização por classe:101203
[Lr] Data última revisão:
101203
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:100930
[St] Status:MEDLINE
[do] DOI:10.1016/j.ympev.2010.09.014



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