2.7.12.2 ATP - 2.7.12.2 ATP dependent on 2.7.12.2 ATP subdomain II with an invariable lysine residue is responsible for ATP binding 2.7.12.2 ATP upon ATP-binding, the transient conformation adopted the configuration of typical kinase folding. In the absence of ATP-binding, the transient state of apo npMAP2K4 may shift to a state of aggregation via non-particular hydrophobic interactions as a result of the exposed hydrophobic residues