Abstract: Five cDNA sequences and their 3' untranslated regions (3' UTR) of ribosome-inactivating protein from Gynostemma pentaphyllum were isolated and analyzed. The coding region of gynostemminⅡ is 825 bp in length, and those of the other four are 831 bp long. Their 3' UTRs are 279, 174, 170, 161 and 171 bp in length, respectively. Two small stem-loop and one AU-rich element were found only in the 3' UTR of gynostemmin I.