Mouse Fezf1 (also called Fez, Zfp312-like or 3110069A13Rik) is a transcription factor, C2H2-type zinc finger protein consists of 475 amino acids, and it is expressed in the olfactory bulb (OB) and hypothalamic region in mice. Experiments of Fezf1-deficient mice indicate that Fezf1 is required for the penetration of olfactory axons through the CNS basal lamina before they innervate the OB.