Heeley DH, Hong C. Isolation and characterization of tropomyosin from fish muscle.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. BIOCHEMISTRY AND MOLECULAR BIOLOGY 1994;
108:95-106. [PMID:
8205394 DOI:
10.1016/0305-0491(94)90169-4]
[Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A comprehensive survey of tropomyosin from various fish myotomal muscles is reported. The fish tropomyosins were blocked at the N-terminus and, as expected, were found to be of similar amino acid composition, alpha-helical content (> 90% at 10 degrees C) and molecular weight to other vertebrate striated muscle forms. The tropomyosins of salmonids and herring muscle were noticeably heterogeneous when assessed by 2D-PAGE. The distribution of isoforms was tissue-specific: slow muscle contained alpha-type tropomyosin while fast muscle contained beta-type tropomyosin. In other species (cod, haddock, wolf-fish and sharks) alpha-type tropomyosins were present in both kinds of muscle but beta-tropomyosin was absent.
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