CIP29 is a 210 amino acid nuclear protein whose expression is upregulated by erythropoietin. Induction of CIP2 expression is associated with cell cycle progression and apoptosis. This transcription factor binds both single stranded (ss) and double stranded (ds) DNA, though it has higher affinity for ssDNA. CIP29 is expressed at low levels in pancreas, spleen, testis, liver, kidney, heart and thymus, and is found to be expressed at higher levels in pancreatic adenocarcinoma and hepatocellular carcinoma. A translocation t(11;12)(q23;q13) in acute myelomonocytic leukemia results in the coding region of CIP29 gene fused to exon 9 of the MLL gene, which encodes for a protein with the N-terminal SAP domain and two C-terminal nuclear localization signals of CIP29 and N-termial AT hooks and central DNA methyltransferase homology region of MLL.