This protein is highly conserved, but its function is unknown. It can be isolated from HeLa cell nucleoli and is found to be homologous with Leydig cell tumour protein whose function is unknown [1, supplementary Table I].

1: Nucleolar proteome dynamics. Andersen JS, Lam YW, Leung AK, Ong SE, Lyon CE, Lamond AI, Mann M; Nature. 2005;433:77-83. PMID:15635413