Abstract
An improved method for the purification of 2 factors (T and G) which are essential for amino-acid polymerization, is described. The T-1 factor is similar to the A-fraction of Allende et al. The G-l factor coincides with the ribosome-linked guanosine triphosphate (GTP)ase, and resembles the previously separated B-fraction except that it is stable in contrast to B. Mainly due to the purification of G, the unrelated GTP hydrolysis could be reduced so that an excess of phosphate release could be observed (apparently dependent on and equivalent to peptide synthesis). One mole of GTP is probably split for every peptide bond formed.

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