Product Description specificalStress-activated component of a protein kinase signal transduction cascade. Regulates the JNK and p38 pathways. Part of a signaling cascade that begins with the activation of the adrenergic receptor ADRA1B and leads to the activation of MAPK14. Pro-apoptotic. Role in regulation of S and G2 cell cycle checkpoint by direct phosphorylation of CHEK2 (PubMed:10924358, PubMed:11836244, PubMed:15342622, PubMed:21224381). Involved in limb development (PubMed:26755636). _x000D_Isoform 1: Phosphorylates histone H3 at 'Ser-28' (PubMed:15684425). May have role in neoplastic cell transformation and cancer development (PubMed:15172994). Causes cell shrinkage and disruption of actin stress fibers (PubMed:11042189).