Nascent polypeptide
Figurę 32-60 Tcrmination pathway in /:. coli ribosomcs. RF-1 rccognizcs thc Stop codons U AA and UACi. whereas RF-2 (not shown) rccognizcs UAA and UG A. Eukaryotic tcrmination
follows an analogous pathway but rcquires only a single class I rclease factor.eRFl. that rccognizcs all thrce Stop codons.