title: Isotrityrosine, a new crosslinking amino acid isolated from Ascaris cuticle collagen.
mesh_terms: D001200:Ascaris / Q000032:analysis*; D003094:Collagen; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D013056:Spectrophotometry, Ultraviolet; D013329:Structure-Activity Relationship; D014443:Tyrosine / Q000031:analogs & derivatives* / Q000302:isolation & purification
chemical_list: D014443:Tyrosine; C030231:isotrityrosine; D003094:Collagen