ELISA kits for the study of the target, hpg are available in ready-to-use formats. The protein is also known as gonadotropin releasing hormone 1 or GNRH1. It is a 92-residue protein with a secreted localization. Other alias names for this target include: GNRH, prolactin release-inhibiting factor, leuteinizing-releasing hormone, GnRH-associated peptide 1, and progonadoliberin-1, and LHRH.