Proliferating cell nu clear antigen (PCNA) plays a vital role in regulating cell replication, repair, and death, and is found in an altered form in breast cancer cells.

• 增殖细胞核抗原在细胞应答、修复及死亡的调控中起着重要作用，并被发现其在乳癌细胞中出现形态改变。