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Allele constitution of 13 B mating specificities of C. cinereus. The different alleles of the three groups of genes together with allele-specific flanking sequences are differentiated by color. Pheromone genes are represented by short boxes and receptor genes by long boxes. mfs1.1 and mfs1.2 are alternative alleles of a conserved gene flanking the B locus. Arrows indicate the direction of pheromone and receptor gene transcription.
