EOG8N8TJT GO:0018149 23/73 peptide cross-linking biological_process "The formation of a covalent cross-link between or within protein chains." [GOC:jsg] EOG8N8TJT GO:0003810 21/73 protein-glutamine gamma-glutamyltransferase activity molecular_function "Catalysis of the reaction: protein glutamine + alkylamine = protein N5-alkylglutamine + NH3. This reaction is the formation of the N6-(L-isoglutamyl)-L-lysine isopeptide, resulting in cross-linking polypeptide chains; the gamma-carboxamide groups of peptidyl-glutamine residues act as acyl donors, and the 6-amino-groups of peptidyl-lysine residues act as acceptors, to give intra- and intermolecular N6-(5-glutamyl)lysine cross-links." [EC:2.3.2.13, RESID:AA0124] EOG8N8TJT GO:0046872 10/73 metal ion binding molecular_function "Interacting selectively and non-covalently with any metal ion." [GOC:ai]