Patton G W, Mets L, Villee C A
Science. 1967 Apr 21;156(3773):400-1. doi: 10.1126/science.156.3773.400.
Nucleate and anucleate halves of sea urchin eggs have seven and five forms of L-malic dehydrogenase, respectively. Fertilization results in reduction of the number of enzyme forms in both halves. The normal complement of seven isozymes in unfertilized eggs appears to be a synthesis of five soluble and four particulate forms. Reduction in the number of isozymes after fertilization takes place principally in solutble forms and appears to be under cytoplasmic control.
海胆卵有核部分和无核部分分别有七种和五种苹果酸脱氢酶形式。受精导致两部分中酶形式的数量减少。未受精卵中七种同工酶的正常组成似乎是五种可溶性形式和四种颗粒形式的合成。受精后同工酶数量的减少主要发生在可溶性形式中，并且似乎受细胞质控制。
