“ DL-Leucylglycylglycine inhibited the oxidation of DL-phenylalanino by 25 per cent, of DL-leucine by 30 ger cent, and of DL-valine by 65 per cent.”
“We have found that the action of pig kidney D-amino-acid oxidase on DL-leucine was inhibited by DL-leucinamide, DL-loucylglycine, DL-leucylglycylglycine , and by glycyl-DL-leucino.”