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NJ tree generated from MEGA showing the phylogenetic relationships among ascomycetes inferred from the HMG domain (129 amino acid characters) of the MAT1-2-1. Number on branches indicated bootstrap support (1000 pseudoreplicates) more than 60% from NJ and PhyML (from left to right). The taxa shaded in gray indicate the presence of truncated MAT genes in opposite MAT isolates.
