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. 2009 Jul 27;4(7):e6321. doi: 10.1371/journal.pone.0006321

Figure 2. A pmt1 pmt4 double deletion is lethal in serotype D.

Figure 2

Serotype D strains pmt1D (MATa pmt1D::URA5 ade2-27) and pmt4D (MATα pmt4D::ADE2 ura5) were crossed on standard V8 mating media and individual spores were isolated after several days by micromanipulation. A: 15 individual progeny were analyzed by colony PCR for the presence of the PMT1 (upper panel) and PMT4 alleles (lower panel). Position of the respective wild-type and disruption alleles are indicated at right. Wild-type strain JEC21 was used as a control. B: The 15 strains from A were spotted onto the indicated plates, grown for 2–3 days at 30°C and subsequently analyzed for auxotrophic marker distribution. Strains were spotted from top left (#1) to bottom right (wild-type control). C: Summary of the genotypes identified in A and B with respect to PMT alleles and mating-type. Mating-type of the individual spores were determined by standard mating reactions using wild-type strains JEC20 (MATa) and JEC21 (MATα) as tester strains.