in a purified system from escherichia coli containing ribosomes complexed with poly ( uridylic acid ) and n-acetyl-phenylalanyl-trna , the nonhydrolyzable analog of gtp , guanyl-5'-yl imidodiphosphate ( guo-5'-p2-nh-p ) , promotes polypeptide synthesis at a rate several times slower than gtp .
C0018366
guanyl-5
C0018353
gtp