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pha-4 encodes the HNF-3 homolog Ce-fkh-1. (A) The genetic (top) and physical (bottom) location of pha-4. (B) Three pha-4 protein isoforms are indicated by ATG. The DBD is hatched. Each mutation depicted was induced by EMS (Mango et al. 1994a) and is the result of a C → T transition, as expected.
