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PGK ISOZYMES DURING SPERMATOGENESIS IN THE MOUSE.
註釋Enzyme activity studies show that a small amount of PGK-2 first appears in the developing testis coincident with the appearance of early spermatids. A significant amount of PGK-2 is not seen until late-middle stage spermatids appear however. Starting at this time a five-fold increase in the total PGK activity of the testis is initiated, which is entirely due to increasing PGK-2 specific activity. This indicates that late-middle stage and more mature spermatids have very high levels of PGK-2 relative to