J. Karasinski, DIVERSITY OF NATIVE MYOSIN AND MYOSIN HEAVY-CHAIN IN FISH SKELETAL-MUSCLES, Comparative biochemistry and physiology. B. Comparative biochemistry, 106(4), 1993, pp. 1041-1047
1. Polymorphism of native myosin and myosin heavy chain (MHC) of fish
skeletal muscles was analysed by pyrophosphate and SDS-gel electrophor
eses. 2. Depending on the species, three or four myosin isoforms were
detected in the white muscle, one or two isoforms in the pure red musc
le, and four isomyosins were found in the red muscle composed of red a
nd pink (intermediate) fibres.3. It is suggested that all main types o
f fish muscle fibre (red, intermediate and white) differ in myosin iso
form content. 4. Myosin heavy chain of the red muscle is a distinct pr
otein from that of the white muscle. However, structural differences b
etween these proteins vary among species.