Abstract:
:An antiserum (anti-H2) directed at the second helix of the helix-loop-helix (HLH) protein MyoD1 reacts with a protein expressed during avian cardiac myocyte differentiation. Indirect immunohistochemical whole mount staining with anti-H2 detected a protein expressed in stage 11 hearts, but not in hearts of older embryos. At the cellular level, this staining is confined to the nucleus of cardiac cells suggesting that these proteins may have DNA-binding abilities. Several proteins were immunoprecipitated by anti-H2 from stage 11 heart tissue. Protein extracts from similarly staged hearts, when incubated with the muscle-specific enhancer sequence of muscle creatinine kinase (MCK), gave a stage-specific band shift in electromobility shift assays (EMSA), and these protein-DNA complexes were recognized and supershifted by anti-H2. Incubation with a MCK sequence containing a mutated E box did not produce a shift. The specific shift was present as early as stage 6, remained through stage 13, and disappeared by stage 17. These data suggest the presence of at least one protein that is transiently expressed in the differentiating cardiac myocyte, that is immunochemically reactive with an antiserum raised against the second helix of MyoD1, and that binds to a muscle-specific DNA enhancer sequence.
journal_name
Dev Bioljournal_title
Developmental biologyauthors
Litvin J,Montgomery MO,Goldhamer DJ,Emerson CP Jr,Bader DMdoi
10.1006/dbio.1993.1088subject
Has Abstractpub_date
1993-04-01 00:00:00pages
409-17issue
2eissn
0012-1606issn
1095-564Xpii
S0012-1606(83)71088-2journal_volume
156pub_type
杂志文章abstract::The germinal vesicle (GV) of starfish oocytes stays just beneath the oocyte cortex at the presumptive animal pole during the long period of oogenesis. We subjected oocytes to a centrifugal force field to detach the GV from the cortex. The association between the cortex and the GV persisted and withstood a small amount...
journal_title:Developmental biology
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Developmental biology
pub_type: 杂志文章
doi:10.1006/dbio.1994.1248
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pub_type: 杂志文章
doi:10.1016/j.ydbio.2006.04.472
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journal_title:Developmental biology
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journal_title:Developmental biology
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pub_type: 杂志文章,评审
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journal_title:Developmental biology
pub_type: 杂志文章
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journal_title:Developmental biology
pub_type: 杂志文章
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journal_title:Developmental biology
pub_type: 杂志文章
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