Cytoplasmic protein NCK2 (NCK adaptor protein 2) (SH2/SH3 adaptor protein NCK-beta) (Nck-2); 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 (380 aa)