Provided below are ELISA kits targeting GDNF inducible zinc finger protein 1, a human protein encoded by GZF1. This protein is 711 amino acids long, with a mass of 80.5 kDa, and is a member of the Krueppel C2H2-type zinc-finger protein family. 2 isoforms have been identified. This is reported to be a cytoplasmic and nuclear protein. There is a noted implication in Joint laxity, short stature, and myopia. Other alias names for this protein include: zinc finger and BTB domain-containing protein 23, zinc finger protein 336, JLSM, and ZBTB23.