title: Skeletal muscle myosins from the yak (Bos grunniens), cattle (Bos taurus) and their hybrids.
abstract: The skeletal muscle myosins of the yak (Bos grunniens), of cattle (Bos taurus) and of their first and second filial generation hybrids have been studied by ATPase measurements, fluorescence spectroscopy, near-ultraviolet circular dichroism and peptide mapping on polyacrylamide gels. The ATPase activities, the intrinsic tryptophan fluorescence enhancement upon addition of ATP and the circular dichroism spectra of the four myosins were closely comparable. Peptide maps of the myosin heavy chains indicate extensive sequence homologies but do reveal differences between the myosins of the yak and cattle.
mesh_terms: D000251:Adenosine Triphosphatases / Q000032:analysis; D000818:Animals; D001947:Breeding; D002417:Cattle / Q000235:genetics / Q000502:physiology*; D002942:Circular Dichroism; D006823:Hybrid Vigor; D006824:Hybridization, Genetic; D009132:Muscles / Q000032:analysis*; D009218:Myosins / Q000032:analysis*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000251:Adenosine Triphosphatases; D009218:Myosins