Figure 5 .

The serotype AD population exhibits genotypic plasticity (2N to 2N-1 to 2N). Two populations are derived from KW5: one with and one without serotype A Chr 14. The serotype A URE1 gene, located on serotype A Chr 14, was amplified from three clones (C2, C3, and C7) from KW5 but not the other 5 clones. All eight clones have the same serotype/mating type, αADa, based on serotype/mating type determination via the use of PCR assays of the STE20 gene. CGH analysis demonstrates that clone C5 has lost serotype A Chr 14, which is extant in the C7 colony.