Enzymatic conversion of the unnatural tripeptide delta-(D-alpha-aminoadipyl)-L-cysteinyl-D-valine to beta-lactam antibiotics.
Shen YQ, Wolfe S, Demain AL. Enzymatic conversion of the unnatural tripeptide delta-(D-alpha-aminoadipyl)-L-cysteinyl-D-valine to beta-lactam antibiotics. J Antibiot (Tokyo). 1984 Sep; 37(9):1044-8.