ACV Tripeptide TFA, a tripeptide, is the first dedicated intermediate in the biosynthetic pathway leading to the penicillin and cephalosporin classes of β-lactam natural products in bacteria and fungi. ACV Tripeptide TFA is is synthesized nonribosomally by the ACV synthetase (ACVS) enzyme, which is encoded by the 11 kb The pchAB gene encodes this enzyme. ACV Tripeptide TFA can be used for the biosynthesis of β-lactam antibiotics[1][2].