Plasminogen activator inhibitor 1 RNA-binding protein (serbp1, not to be confused with srebp1) is a protein that in humans is encoded by the SERBP1 gene.
Cholesterol homeostasis is regulated, at least in part, by sterol regulatory element (SRE)-binding proteins (e.g., SREBP1) and by liver X receptors (e.g., LXRA).