the effect of alpha-sarcin and that of rips on the interaction of elongation factors with artemia salina ( brine shrimp ) ribosomes have been investigated . alpha-sarcin inhibits both the ef1 ( elongation factor 1 ) -dependent binding of aminoacyl-trna and the gtp-dependent binding of ef2 ( elongation factor 2 ) to ribosomes , whereas two of the rips tested , ricin from ricinus communis ( castor bean ) and volkensin from adenia volkensii ( kilyambiti ) , inhibit only the latter reaction .
C1149035
gtp
C0059037
elongation factor 2