Abstract

New evidence for the inhibition by harringtonine in the formation of the first peptide bond in protein synthesis was obtained by means of experiments in the cell-free system. The antitumour drug strongly blocked dipeptide synthesis in the system without elongation factor G and GTP. Furthermore, it inhibited N-Acetyl-phenylalanyl-puromycin formation from N-Acetyl-phenylalanyl-tRNA, puromycin, and ribosomes.

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