Transcriptional activator. C/EBP are DNA-binding proteins that recognize two different motifs: the CCAAT homology common to many promoters and the enhanced core homology common to many enhancers. Required for the promyelocyte-myelocyte transition in myeloid differentiation. Binds DNA as a homodimer and as a heterodimer. Can form stable heterodimers with CEBPA, CEBPB and CEBPD (PubMed:1884998). Interacts with GATA1 AND SPI1 (By similarity). Interacts with SMARCD2 (By similarity). Belongs to the bZIP family. C/EBP subfamily.