title: The content of dityrosine in chick and rabbit aorta proteins.
abstract: The possible presence of dityrosine in elastin derived by two different methods and in structural glycoproteins from aortas of 1 day old chicks, adult rabbits and fetal rabbits was determined by a sensitive spectrofluorimetric procedure. Only chick tissues were found to contain dityrosine, 0.3 residues/100,000 total amino acid residues in aortic elastin and 12-15 residues/100,000 residues in the structural glycoproteins. No dityrosine could be detected in any of the fetal or mature rabbit tissues. However, related fluorescent compounds with different excitation-emission maxima and different elution times were obtained by ion exchange chromatography of structural glycoproteins partially hydrolyzed under alkaline conditions.
mesh_terms: D000375:Aging; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D001011:Aorta / Q000032:analysis* / Q000196:embryology; D055598:Chemical Phenomena; D002621:Chemistry; D004549:Elastin / Q000032:analysis* / Q000302:isolation & purification; D005260:Female; D006023:Glycoproteins / Q000302:isolation & purification*; D011247:Pregnancy; D011817:Rabbits; D014443:Tyrosine / Q000031:analogs & derivatives*
chemical_list: D000596:Amino Acids; D006023:Glycoproteins; D014443:Tyrosine; D004549:Elastin