C/EBP family members include C/EBP alpha, C/EBP beta, C/EBP gamma , C/EBP delta, C/EBP E and C/EBP ?, all of which are capable of forming homodimers or heterodimers with each other. C/EBP ?, also known as CBF2, NOC1, CHOP10 (C/EBP homologous protein 10), GADD153 (growth arrest and DNA damage-inducible gene 153) or HSPCBF, is a ubiquitously expressed 1,054 amino acid protein that localizes to the nucleus and regulates transcription. More specifically, C/EBP ? is believed to play a role regulating the expression of CRP (C-reactive protein). Unlike most C/EBP dimers, C/EBP ?-containing dimers do not bind the classical C/EBP-binding consensus sequence. Rather, C/EBP ?-containing dimers must associate with RBP-Jk (another transcription factor) in order to accomplish binding to the C/EBP site.