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Effect of Electrical Stimulation on Postmortem Property Change of Myofibrillar Proteins
Author(s) -
KANG J. O.,
ITO T.,
FUKAZAWA T.
Publication year - 1983
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1983.tb14779.x
Subject(s) - myofibril , stimulation , myosin , heavy meromyosin , postmortem changes , actin , titin , chemistry , atpase , contraction (grammar) , anatomy , biophysics , biochemistry , medicine , microbiology and biotechnology , biology , endocrinology , myocyte , pathology , sarcomere , enzyme
Changes 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 −4 M for at‐death muscle, 1.70 ± 10 −4 M for muscle stored for 1 day and 1.49 ± 10 −4 M for muscle stored for 7 days. This indicates that electrical stimulation treatment minimized the postmortem change of actin‐myosin interaction.