Abstract
1. 1. White skeletal muscle myosin of four marine teleost fish species (cod, blue whiting, Norway haddock, and spotted wolf-fish) was analyzed by native, SDS-PAGE, and 2-dimensional electrophoresis. 2. 2. Four types of native myosin were present in cod, blu whiting and Norway haddock. The second fastest migrating form was predominant. 3. 3. Myosin from spotted wolf-fish also resolved into four forms. The fastest migrating form was hardly noticeable. The other three were present in apparently similar amounts. 4. 4. In the myosin from each species there were three types of light chains. The pattern of light chains was species specific. 5. 5. Apparently, there was only one type of heavy chain in myosin from cod, Norway haddock and spotted wolf-fish. One preparation of cod showed an extra band of higher electroporetic mobility than the main band. In blue whiting we found two bands present in approximately equal amounts.
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