Metabolism of Bovine Semen. IX. Glutamic-Oxaloacetic and Glutamic-Pyruvic Transaminase Activities

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Abstract
Assays of 63 samples of bovine semen gave an average of 623 [plus or minus] 48 units of glutamic-oxaloacetic transaminase (GO-T) and 15 t 1 units of glutamic-pyruvic transaminase (GP-T)/ml of seminal plasma. Statistically significant correlations of 0.849 for GO-T and 0.409 for GP-T were observed between seminal plasma transaminase activity and numbers of spermatozoa/ml of semen. When spermatozoa were freed of seminal plasma more activity was associated with the cells than with the plasma. With seminal plasma-free cells, GO-T/mg of dry weight was similar to that reported in several bovine tissues, but lower than the activity in heart, liver and skeletal muscle.