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CALCIUM UPTAKE AND ATPASE ACTIVITY BY SARCOPLASMIC RETICULUM OF RED AND WHITE POULTRY MUSCLES
Author(s) -
WHITING R. C.,
RICHARDS J. F.
Publication year - 1978
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.1365-2621.1978.tb02387.x
Subject(s) - endoplasmic reticulum , calcium , chemistry , atpase , calcium atpase , reticulum , skeletal muscle , medicine , sarcoplasm , endocrinology , biochemistry , biology , enzyme , organic chemistry
Sarcoplasmic reticulum was isolated from P. major (white) and B. femoris (red) and assayed for calcium uptake and ATPase activity. The activities did not decline at 4 hr postmortem (rigor onset) and only slightly decreased with 24 hr aging. The prerigor P. major sarcoplasmic reticulum preparation had the lowest calcium uptake and ATPase activity, and mixtures of this fraction with others resulted in a lower activity than expected from the proportionate composition. Sarcoplasmic reticulum from B. femoris was affected more than that from P. major by decreasing temperatures. Freeze‐thawing the muscles did not destroy calcium uptake ability.