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Aligned sequence of M5 mAChR with the template turkey β1-AR. The identified 7 transmembrane (TM) helices and helix 8 are labeled above the sequence. The numbers in parenthesis are the positions for the last residue of TM5. The stars refer to the identical residues, the double filled periods refer to the conservative substitutions, and the filled perigods to the variable conservative substitutions.
