This gene encodes a secreted protein belonging to the neurotrophin family of structurally related molecules that play a crucial role in the control of neuronal numbers and of dendritic growth. The encoded preproprotein undergoes post-translational processing to generate non-covalently associated homodimeric functional protein. Mice deficient in the encoded protein exhibit a loss of sensory neurons in the nodose-petrosal and geniculate ganglia, have deficits in long-term memory and hippocampal long-lasting long-term potentiation. [provided by RefSeq, Oct 2015]