. "\"The chemical reactions and pathways resulting in the formation of a peptidyl cysteine-peptidyl serine cross-link by the condensation of a cysteine thiol with the carbonyl of the preceding residue and alpha-beta dehydrogenation.\" [RESID:AA0242]" . . "peptide cross-linking via L-serine thiazolecarboxylic acid" . "RESID:AA0242" . . . .