copper containing modified residue methanobactin SB2 copper complex 289.875518798828125 290.769989013671875 83.8571624755859375 84.48000335693359375 METAL copper [Cu-methanobactin SB2 complex] C, C, R, T H -9 N 1 O 1 Cu 1 A protein modification that effectively converts two L-cysteine residues, an L-arginine residue, an L-threonine residue and a copper atom to the methanobactin SB2 copper complex. C 6 H 1 N 3 O 3 S 2 Cu 1 natural methanobactin SB2 copper complex N-term [5-(hydroxy[sulfanyl-kappaS]methylene)-3,5-dihydro-4H-imidazol-4-onato-kappaN1][4-(hydroxy[sulfanyl-kappaS]methylene)-1,3-oxazol-5(4H)-onato-kappaN]copper PSI-MOD MOD:01879 metal or metal cluster coordinated L-cysteine residue