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在分化过程中,胚胎组织中一些酶的特异性活性在妊娠的不同阶段可有变化。此外,一些在胚胎和新生儿期观察到的多型性酶的同功酶类型也不同于那些在成人组织中的同功酶类型。本文作者观察了大白鼠胚胎肝脏中乳酸脱氢酶(EC1.1.1.27)同功酶4(LDH4)和同功酶5(LDH5)的变化情况。根据同功酶中A(肌肉)和B(心脏)型亚单位比例的变化
During differentiation, the specific activity of some enzymes in embryonic tissue may vary at different stages of pregnancy. In addition, some of the isozymatic types of polymorphic enzymes observed during embryonic and neonatal periods are also different from those of the isozyme types in adult tissues. The authors observed the changes of lactate dehydrogenase (EC1.1.1.27) isoenzyme 4 (LDH4) and isoenzyme 5 (LDH5) in the embryonic liver of rats. According to the isozyme A (muscle) and B (heart) type of subunit changes