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Residue numbering is based on human eRF1 (GenBank accession no. U90176).
*Measured from the Cα of Gln185 to the tip of the target side chain.
†Part of the GGQ motif in eRF1 domain 2.
§In the α2-helix–loop–α3-helix region in domain 1.
¶In cavity 2 in domain 1. Cavity numbering as per Bertram et al. (10).
