Abstract
ABSTRACTChanges in biochemical properties of myofibrillar proteins of rabbit muscle, which had been subjected to electrical stimulation soon after slaughter, during postmortem storage at 0°C were investigated. Myofibrillar ATPase activity and the ATPase activity of acto‐heavy meromyosin (HMM) complex, reconstituted from actin and HMM which had been prepared from at‐death and postmortem muscles, decreased at first and then increased slightly during 7 days storage. In addition, the change of the dissociation constant of acto‐HMM complex of electrically stimulated muscle during postmortem storage was quite small, i.e., 1.59 ± 10−4M for at‐death muscle, 1.70 ± 10−4M for muscle stored for 1 day and 1.49 ± 10−4M for muscle stored for 7 days. This indicates that electrical stimulation treatment minimized the postmortem change of actin‐myosin interaction.
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