The function of NCK2 (NCK adaptor protein 2, Ensembl gene identifier ENSG00000071051) is as follows. Adapter protein which associates with tyrosine-phosphorylated growth factor receptors or their cellular substrates. Maintains low levels of EIF2S1 phosphorylation by promoting its dephosphorylation by PP1. Plays a role in ELK1-dependent transcriptional activation in response to activated Ras signaling. {ECO:0000269|PubMed:10026169, ECO:0000269|PubMed:11171109, ECO:0000269|PubMed:16835242}.