four amino acids -- alanine , 2,3-diaminopropionic acid , cystine , and cystein -- and also one diamine , ethylenediamine , were chelated with 99m-technetium ( 99mtc ) , and their renal excretion patterns were studied in rabbits in the presence and absence of two renal tubular transport inhibitors , probenecid and 2,4-dinitrophenol .
C0002520
amino acids
C0001898
alanine