Rev-ErbA beta (Rev-erbβ) also known as NR1D2 (nuclear receptor subfamily 1, group D, member 2) is a protein that in humans is encoded by the NR1D2 gene.
Rev-erbβ is a member of the Rev-ErbA family of transcription factors. Rev-erbβ, like Rev-erbα, belongs to the nuclear receptor superfamily and can modulate gene expression by directly binding to their promoters.