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Alignment of human hCB1R, hCB1a, and hCB1b with mouse mCB1a and mCB1b N-terminal variants. Identical amino acids are marked by (*), conservative changes by (.), and the gaps by dashed lines. Transmembrane domain 1 (TM1) is underlined, and a potential N-linked glycosylation site is marked by italics (N)
