There are two kinds of molecular containing histone deacetylase activity: One is homology with yeast RPD3,and another is not homology with yeast RPD3.

• 含有组蛋白脱乙酰化酶活性的分子有两类:一类是与酵母RPD3同源的分子,另一类是与RPD3不同源的分子。