HBP1 is a transcriptional repressor that regulates target genes by binding specifically to promoter regions, specifically favoring the sequence 5'-TTCATTCATTCA-3'.Its key role in the cell cycle and Wnt pathway involves promoting enhanced binding to the histone H1.0 promoter through the RB1 interaction.HBP1 Protein, Human (His) is the recombinant human-derived HBP1 protein, expressed by E.coli , with N-His labeled tag.