Rakitzis E T
Biochem J. 1984 Oct 1;223(1):259-62. doi: 10.1042/bj2230259.
The plot of fractional enzyme activity versus extent of protein modification, for cases where all enzyme modifiable groups of a certain kind are essential for activity, is found to be nearly independent of the number, per enzyme active site, of modifiable groups involved. Such plots usually, by a fallacious extension of the initial portion of the plot on the extent-of-modification axis, are interpreted to mean the modification of one single group per enzyme active site (or per enzyme molecule). The possible relevance of these findings to cases in the literature is discussed.
对于某类所有可被修饰的酶基团对活性都至关重要的情况,酶活性分数与蛋白质修饰程度的关系图被发现几乎与每个酶活性位点所涉及的可修饰基团数量无关。通常,通过在修饰程度轴上对关系图初始部分进行错误的延伸,这些关系图被解释为意味着每个酶活性位点(或每个酶分子)有一个单一基团被修饰。文中讨论了这些发现与文献中相关案例的可能关联性。