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Alignment of 5′ nucleotide sequences of mammalian TGRs. The alignment of nucleotide sequences of mammalian TGRs corresponding to the 5′-UTR and an initial part of the coding sequence is shown. The newly identified start codon is marked by stars, and the AUG previously thought to serve as the initiation signal is marked by triangles. For sequence accession numbers, see supplemental Table S2.
