Amino Acid Starvation Enhances Programmed Ribosomal Frameshift in Metavirus Ty3 of Saccharomyces cerevisiae

Table 2

Gcn2p is required for the increase of PRF efficiency in response to amino acid starvation.

Yeast strains and relevant mutations	% frameshift rates  ± SD
	Normal growth	3-AT treated
Wild type	4.0 ± 0.2	9.2 ± 0.5
(Δgcn2)	4.0 ± 0.4	5.0 ± 0.5

% frameshift rates were calculated as the percent of the ratio of β-galactosidase activities expressed from the Ty3-frameshift plasmid to the β-galactosidase activities expressed from the Ty3-frame fusion plasmid in the relevant yeast transformants.
±SD: standard deviations.