Ready-to-use ELISA kits are available for the detection of Heregulin, an alias of the protein, neuregulin 1. The official gene symbol is NRG1. The protein, with a mass of 70.4 kDa and length of 640 residues, is reported to be nuclear, membrane-associated and secreted. It is a member of the Neuregulin family and may be known by other names, including: sensory and motor neuron derived factor, pro-NRG1, heregulin alpha (45kD ERBB2 p185-activator), glial growth factor 2, acetylcholine receptor-inducing activity, and pro-neuregulin-1 membrane-bound isoform, and GGF2.