Transaminases of Skeletal Muscle. 2. Transaminase Activities in White and Red Muscles of Pigs and Cows

摘要

SUMMARY:The total activity of glutamic‐oxaloacetic transaminase (GOT). the relative activity of the mitochondrial GOT isozyme (GOTM) and the total activity of glutamic‐pyruvic transaminase (GPT) in five different muscles of four pigs and two cows were determined. A highly significant, positive correlation was found between either GOT or GPT activity and the amount of muscle pigments. Tonic “red”) (muscles had high transaminase activities and tetanic (“white”) muscles had low transaminase activities. However, the relative GOTmactivity (GOTMactivity in percent of the totaf GOT activity) of porcine muscle was found to be almost constant in the different types of muscle. Likewise, in bovine muscles, higher GOT and GPT activities were found in “red” than in “white” muscles. However, the relative GOTK activity seemed to be higher in the “red” than in the “white” muscles. A discussion of the transaminase activities and their relationship to m