Plays a role in the regulation of neuronal activity. Detected in the nucleus membrane of non-neuronal cells and in axonal outgrowths of neuronal cells (PubMed:15255972). Strong expression in whole nervous system up to 12.5 dpc. Highly expressed in all neuronal differentiation fields from 14.5 dpc to birth, with highest expression in the telencephalic cortical plate and mitral cells in the olfactory bulb, and lower expression in neuronal progenitor zones. Progressively decreased expression in fields of neuron precursor proliferation from 14.5 dpc and virtually undetectable there by 17.5 dpc. No significant expression detected outside the nervous system. After birth, significant expression remains in the cerebellum, olfactory bulb and hippocampus. In the embryo, stronger expression at 15.5 dpc than at 10.5 dpc or 19.5 dpc. Expression decreases after birth although significant expression remains associated with some neuronal structures at P10. Belongs to the macoilin family.