Definition: A group of enzymes that catalyze the calcium-dependent acyl transfer reaction in which the amide moiety of peptide-bound glutaminyl residues serve as acyl donor; a specific transglutaminase covalently cross-links fibrin molecules between glutamine and the e-amino group of a lysyl residue, thus producing a more stable fibrin clot; another transglutaminase participates in the formation of the chemically resistant envelope of the stratum corneum during terminal differentiation of keratinocytes.
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Examples: glitazone, GI cocktail, etc.