OBSOLETE. The formation of S-(peptidyl-glycyl)-peptidyl-cysteine cross-links by the formation of a thiolester between cysteine and the carboxy-terminal glycine of ubiquitin and other proteins.
OBSOLETE. The cross-linking of a tyrosine residue to a tryptophan residue and a methionine residue to form S-[5'-(L-tryptoph-6'-yl)-L-tyrosin-3'-yl]-L-methionin-S-ium.