Formation of Myofibrillar Fragments and Reversible Contraction of Sarcomeres in Chicken Pectoral Muscle |
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Authors: | KOUI TAKAHASHI TOSHIYUKI FUKAZAWA TSUTOMU YASUI |
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Affiliation: | Department of Animal Science, Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan |
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Abstract: | SUMMARY— As morphological changes occurred in the pectoral muscles of chicken carcasses during 48 hr storage at 5°C, two notable phenomena were observed: (1) fragmentation of myofibrils and (2) reversible or irreversible contraction of sarcomeres. When blendorized, myofibrils tend to break into small fragments composed of 1-4 sarcomeres with time post-mortem. It was also found that besides an irreversible post-mortem contraction of sarcomeres generally accepted, a reversible contraction can take place under particular conditions. |
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