作者: M Periasamy , E E Strehler , M A Strehler-Page , R M Wydro , B Nadal-Ginard
DOI: 10.1016/S0021-9258(17)36337-8
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摘要: Abstract We report here the isolation and characterization of cDNA genomic sequences corresponding to a rat embryonic myosin heavy chain (MHC) protein. This gene, which is present as single copy in genome, comprises about 25 kilobase pairs DNA contains approximately 80% intronic sequences. The MHC gene belongs highly conserved multigene family, exhibits high degree nucleotide amino acid sequence conservation with other sarcomeric genes from nematode man. S1 nuclease mapping experiments using probes show that this transiently expressed during skeletal muscle development. Its mRNA detected fetal early development persists up 2 weeks after birth overlapping expression neonatal adult mRNAs. However, not exception extraocular fibers. transient isoform produced by its sequential replacement MHCs raises interesting questions mechanism controlling isozyme transitions physiological significance individual