Analysis of imatinib and sorafenib binding to p38alpha compared with c-Abl and b-Raf provides structural insights for understanding the selectivity of inhibitors targeting the DFG-out form of protein kinases. - Namboodiri HV; Bukhtiyarova M; Ramcharan J; Karpusas M; Lee Y; Springman EB (Biochemistry, 2010)