CRYSTALLIZATION AND X-RAY STRUCTURE DETERMINATION OF CYTOCHROME C2 FROM RHODOBACTER SPHAEROIDES IN THREE CRYSTAL FORMS
QEGDPEAGAKAFNQCQTCHVIVDDSGTTIAGRNAKTGPNLYGVVGRTAGTQADFKGYGEGMKEAGAKGLAWDEEHFVQYV QDPTKFLKEYTGDAKAKGKMTFKLKKEADAHNIWAYLQQVAVRP
THE BINDING OF IMIDAZOLE INDUCES CONFORMATIONAL CHANGES BETWEEN RESIDUES 98 AND 104.
THE BINDING OF AN IMIDAZOLE MOLECULE, RESIDUE 125, TO THE IRON ATOM OF THE PROSTHETIC HEME (RESIDUE 126) REPLACES THE SULFUR ATOM OF A CONSERVED METHIONINE (RESIDUE 100) AS AN AXIAL LIGAND.
MKFQVKALAAIAAFAALPALAQEGDPEAGAKAFNQCQTCHVIVDDSGTTIAGRNAKTGPNLYGVVGRTAGTQADFKGYGE GMKEAGAKGLAWDEEHFVQYVQDPTKFLKEYTGDAKAKGKMTFKLKKEADAHNIWAYLQQVAVRP