The oxidation of the C alpha-C beta bond of peptidyl-tyrosine to form peptidyl-dehydrotyrosine coupled with cyclization of neighboring residues.
Comment:
See also the biological process terms 'peptide cross-linking via L-seryl-5-imidazolinone glycine ; GO:0018252' and 'peptide cross-linking via 2-imino-glutaminyl-5-imidazolinone glycine ; GO:0019729'.