L-serine microcin E492 siderophore ester 831.197021484375 831.69000244140625 935.2318115234375 935.77001953125 L-serine microcin E492 siderophore ester Microcin Unimod origin corrected [JSG]. C 39 H 43 N 4 O 23 natural PSI-MOD A protein modification that effectively converts an L-serine residue to L-serine microcin E492 siderophore ester. MOD:00379 S MOD_RES Serine microcin E492 siderophore ester N-[5-(6-O-seryl-beta-glucosyl)-2,3-dihydroxybenzoyl]-O-[N-(2,3-dihydroxybenzoyl)-O-[N-(2,3-dihydroxybenzoyl)seryl]seryl]serine C-term microcin E492 siderophore ester from serine C 36 H 37 N 3 O 20 modified L-serine residue