Differential effects of 40S ribosome recycling factors on reinitiation at regulatory uORFs in GCN4 mRNA are not dictated by their roles in bulk 40S recycling.

The Tma proteins appear to make no contribution to recycling and REI at native uORF3, as the uORF3-only reporter expression is unaffected by the tma20 ∆ tma64 ∆ mutations; whereas its conversion to uSt-st3 confers a modestly significant Tma-dependence for recycling and suppression of REI (Fig. 7B , cols. 5–8).

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