a: A ribbon representation of complex 5 returned by ClusPro using ZDOCK-generated complexes as input. The location of a residue each on TNFR1(S105 in the elongated, all-beta structure) and HP986 (L76 in the alpha + beta structure) is shown as an example to demarcate the likely binding site. b: TNFR1 is rendered as molecular surface colored with electrostatic potential and HP986 is rendered in tube representation. The loop region containing L76 (172) residue is colored in yellow. L76 residue is shown as a ball-and-stick model.