L-cysteinyl molybdopterin (4R,5aR,11aR)-8-amino-2-[(2R)-2-amino-2-carboxyethyl]sulfanyl-4,5a,6,9,10,11,11a-heptahydro-4-(phosphoric acid)methyl-2,2,10-trioxo-pteridino[6,7-5,6]pyrano[3,4-4,3][1,2,5]molybdadithiolene 520.27001953125 521.88409423828125 623.40997314453125 624.89324951171875 A protein modification that effectively converts an L-cysteine residue to L-cysteinyl molybdopterin. C C 10 H 11 Mo 1 N 5 O 8 P 1 S 2 C 13 H 16 Mo 1 N 6 O 9 P 1 S 3 L-cysteinyl molybdopterin METAL Molybdenum-pterin MOD:00151 MoPterCys Molybdopterin PSI-MOD Unimod:391 cysteinyl Mo-molybdopterin cysteinyl Mo-pterin molybdoenzyme molybdenum cofactor molybdopterin natural molybdenum pterin containing modification phosphorus containing modified residue metal or metal cluster coordinated L-cysteine residue