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Protein sequence alignment of pheromone receptors. CcRcb3, Rcb3 of Coprinus cinereus (GenBank accession number AF186385); ScBbr2, Bbr2 of S. commune (GenBank accession number AF148501); UmPra1, Pra1 of U. maydis (GenBank accession number U37795); CnCPRα, Cprα of C. neoformans (GenBank accession number AF259519). Black boxes indicate the regions of identity, and gray boxes indicate the regions of similarity. Putative transmembrane domains 1 to 7 are indicated by dotted underlines.
