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Diagram of vegetative incompatibility in Podospora. Three strains were inoculated on a plate of growth media. Chromosomal alleles het-s and het-S and the presence ([Het-s]) or absence ([Het-s*]) of the prion form of the het-s protein are shown. After several days, the het-s [Het-s] strain and het-S strain show the incompatibility reaction, marked by death of fused hyphae and lack of pigmentation near the barrier.
