... and part of the His-tag was observed in the B chain. A fewamino acid residues are found in disallowed regions in the Ramachandran plot; these are A4 , A1 65, A1 67, B3, B4 and F165, all of which are ... main-chain and medium side-chain restraints. Modelbuilding was carried out in o [29] and coot [30]. In chain A, residues 1 and 169– 176 are missing; in chain B, residues 1 67 172 are missing; in ... chain C, residues1, 2 and 169– 174 are missing; in chain D, residues 168– 174 are missing; in chain F, residues 1 and 168– 175 are missing.All amino acid residues were present in the E chain, and part...