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The pathway of IF2·GTP and fMet-tRNAfMet binding to the 30S* complex. The main pathway is shown vertically. The formation of the ternary complex IF2·GTP·fMet-tRNAfMet, which is probably an insignificant side reaction under normal conditions, might take place under conditions of 30S subunit shortage, perhaps acting as a storage complex. IC, initiation complex; IF, initiation factor.
