At these pre-decision stages, apparently opposing chromatin structures may coexist on a gene locus but resolve in subsequent stages into exclusively activating or silencing structures (Fig. 1).

• 在前决定阶段里，明显的反向的染色质结构可能共同存在基因位点，但是在后来的阶段分解成专有的具有活性或沉默的结构。