The Ames dwarf gene, df, is required early in pituitary ontogeny for the extinction of Rpx transcription and initiation of lineage-specific cell proliferation - Gage,P.J.; Brinkmeier M,S L M.L.; Knapp,L.T.; Camper,S.A.; Mahon,K.A. (Mol Endocrinol, 1996)