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A protein which binds to enhancers having a conserved CCAAT sequence. CCAAT enhancer binding proteins are a subclass of bZIP transcription factors that bind the CCAAT DNA sequence as homo- or heterodimers with other family members, C/EBP-alpha, beta, gamma, delta, epsilon. They include both transcriptional activators and repressors, and some are involved in myelopoiesis.
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