Forms of genes ★ cis action factor Affects the activity only of dna sequences on its own molecular of dna, this property usually implies that the factor does not code for prote 通过核苷酸自身的特异二级结构控制与它紧密连锁的结 构基因的表达,一般不编码蛋白质。(无基因产物的DNA功 能区)★ cis action factor Affects the activity only of DNA sequences on its own molecular of DNA, this property usually implies that the factor does not code for protein 通过核苷酸自身的特异二级结构控制与它紧密连锁的结 构基因的表达，一般不编码蛋白质。(无基因产物的DNA功 能区) Forms of genes