Enables heparin binding activity; identical protein binding activity; and protein kinase C binding activity. Involved in several processes, including development of secondary female sexual characteristics; neuron cellular homeostasis; and positive regulation of hormone secretion. Located in several cellular components, including dendrite; extracellular space; and perikaryon. Orthologous to human NELL2 (neural EGFL like 2). [provided by Alliance of Genome Resources, Apr 2022]