EN
Inhibitory potencies of 24 α-aminophosphonic acids against barley seeds (Hordeum vulgare L.) metalloaminopeptidase have been determined to evaluate structural requirements of this enzyme. The enzyme was sensitive mostly to the influence of phosphonic acid analogues of phenylalanine and its homologues, thus showing narrow specificity if compared with porcine aminopeptidases M1 and M17 and with Plasmodium aminopeptidase M17.