... positivelycharged: His35, His 83, Lys79, Asn26, and Asn77 (seeTable 3 for a list of contacts between the ligand and the protein). Another arginine, Arg1 53, is close to the open-ing of the cavity, but ... pathway of isoprenoid quinones. This indicatesthat, despite the fact that the three proteins belong to the YceI-like family from the point of view of the amino acid sequence and of the 3D structure, ... strand C to strand D, and a turn of helix (helix II) at the end of strand G,complete the structure. The electron density is clearlydefined for all residues from 18 to 181, with the exception of...