L-citrulline (S)-2-amino-5-(carbamoylamino)pentanoic acid 0.98000001907348632812 0.98401600122451782227 157.0851287841796875 157.1699981689453125 2-amino-5-(aminocarbonyl)aminopentanoic acid A protein modification that effectively converts an L-arginine residue to L-citrulline. C 0 H -1 N -1 O 1 C 6 H 11 N 3 O 2 Cit Citrulline Deamidated Deamidation L-citrulline MOD:00219 MOD_RES Citrulline N5-(aminocarbonyl)ornithine N5-carbamoylornithine N5-carbamylornithine PSI-MOD R This modification is not the result of deamidation, instead the guanidino group is replaced with an ureido group. Unimod:7 alpha-amino-delta-ureidovaleric acid citrullinationr delta-ureidonorvaline natural uniprot.ptm:PTM-0092 modified L-arginine residue