ELOC（elongin C），癌症关联基因，基因ID：6921，这个基因编码蛋白质elongin C，它是转录因子B（SIII）复合物的一个亚单位SIII复合物由elongins A/A2、B和C组成，它通过抑制RNA聚合酶II在转录单位内的许多位点上的短暂停顿来激活伸长elongin a作为siii复合物的转录活性成分发挥作用，而elongin b和c是调节亚单位。Elongin A2在睾丸中特异表达，能与elongins B和C形成稳定的复合物。von Hippel-Lindau抑癌蛋白与elongins B和C结合，从而抑制转录延长已鉴定出编码两种不同亚型的多个选择性剪接转录变体[由RefSeq提供，2011年3月]This gene encodes the protein elongin C， which is a subunit of the transcription factor B (SIII) complex. The SIII complex is composed of elongins A/A2， B and C. It activates elongation by RNA polymerase II by suppressing transient pausing of the polymerase at many sites within transcription units. Elongin A functions as the transcriptionally active component of the SIII complex， whereas elongins B and C are regulatory subunits. Elongin A2 is specifically expressed in the testis， and capable of forming a stable complex with elongins B and C. The von Hippel-Lindau tumor suppressor protein binds to elongins B and C， and thereby。