4XE0:
reference: Structural, Biochemical and Biophysical Characterization of Idelalisib Binding to Phosphoinositide 3-kinase Delta., Somoza JR, Koditek D, Villasenor AG, Novikov N, Wong MH, Liclican A, Xing W, Lagpacan L, Wang R, Schultz BE, Papalia GA, Samuel D, Lad L, McGrath ME, J Biol Chem. 2015 Jan 28. pii: jbc.M114.634683. PMID: 25631052

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