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Amino acid sequence alignment of MC receptors constructed using ClustalW 1.8. Putative transmembrane (TM) regions are marked with lines. Black and grey boxes mark conserved and similar amino acid positions, respectively. The abbreviations used: Hsa, human; Gga, chicken; Dre, zebrafish; Lfl, lamprey and Mgl, hagfish. Mgl MCc sequence is partial (119 aa). The accession numbers are listed in "Methods".
