Nur (biology)

Nur (nuclear receptor subfamily 4) is a family of orphan nuclear receptors which act as transcription factors in neuron development and maintenance. Three members have been identified in humans:
 * nerve Growth factor IB (Nur77, or ),
 * nuclear receptor related 1 protein (Nurr1, or ), and
 * neuron-derived orphan receptor 1 (Nor-1, or ).