NCU-G1 is a set of highly conserved nuclear proteins rich in proline with a molecular weight of approximately 44 kDa. Especially high levels are detected in human prostate, liver and kidney. NCU-G1 is a dual-function family capable of functioning as a transcription factor as well as a nuclear receptor co-activator by stimulating the transcriptional activity of peroxisome proliferator-activated receptor-alpha (PPAR-alpha) [1].

1: Human NCU-G1 can function as a transcription factor and as a nuclear receptor co-activator. Steffensen KR, Bouzga M, Skjeldal F, Kasi C, Karahasan A, Matre V, Bakke O, Guerin S, Eskild W; BMC Mol Biol. 2007;8:106. PMID:18021396