class ii genes造句

mhc is an extended cluster of genes with extraordinary polymorphism, which consists of three classes of genes ( class i, class ii and classiii ) . they are different from each other in their structure, expression, mode of evolution and so on . class ii genes are further divided into two subclasses and the mhc genes spread over nearly all vertebrates extensively
mhc基因是一个高度多态的基因群，主要包括三大类基因?类(class)、类(class)和类(class)基因，它们无论在结构组成、表达组织的类型、刺激特定t细胞的类群及长期进化等方面都有所不同；类基因还可进一步分为a、b两个亚类：各类基因广泛分布于各种脊椎动物体内。
besides the immunological functions, mhc genes also play important roles in many other respects . the polymorphism of mhc genes, especially of mhc class ii genes, is the most essential property . moreover, mhc genes are usually used to analyze the genetic structure and genetic variation in conservation genetics
mhc除了具有免疫功能外，还在其它许多方面起作用：mhc基因的多态性是最受关注的特征，尤其是类基因，因此可将mhc位点作为一种遗传标记，用于种群遗传结构和变异性的研究，这对于一些濒危物种的遗传保护起到重要的作用。
It's difficult to find class ii genes in a sentence. 用class ii genes造句挺难的