monohydroxylated tryptophan 7'-hydroxy-L-tryptophan (2S)-2-amino-3-(7-hydroxy-1H-indol-3-yl)propanoic acid 15.994915008544921875 16.0 202.0742340087890625 202.2100067138671875 7'-hydroxy-L-tryptophan 7-hydroxy-L-tryptophan A protein modification that effectively converts an L-tryptophan residue to a 7'-hydroxy-L-tryptophan. C 0 H 0 N 0 O 1 C 11 H 10 N 2 O 2 MOD:01664 PSI-MOD W natural uniprot.ptm:PTM-0427