Eukaryotic translation initiation factor 2C, subunit 2 (EIF2C2; AGO2), is a member of the argonaute protein family. It is a core component of RNA-induced silencing complex (RISC). The EIF2C2 belonging to the human argonaute protein family possesses endonuclease activity and functions as a slicer in gene silencing pathways. It recognizes and cleaves target mRNA by RNA interference. In small interference RNA (siRNA) pathway, EIF2C2 forms a complex with EIF2C1 and siRNA, and in microRNA (miRNA) pathway, it binds EIF2C3 to miRNA. EIF2C2 expression is controlled by epidermal growth factor receptor and mitogen-activated protein kinase signaling in human breast cancer cell line.