Anti-Zf9 antibodies are protein reagents that detect specific antigens. The Zf9 antigen is another term for the human protein KLF transcription factor 6, encoded by the KLF6 gene. The protein is known to function in B cell differentiation and the regulation of transcription, among other biological roles. Canonically, it has an amino acid length of 283 residues and a mass of 31.9 kilodaltons. Its subcellular localization is in the nucleus and it is reported to be highly expressed in the placenta followed by spleen, thymus, prostate, testis, small intestine and colon. The Zf9 protein is a member of the Krueppel C2H2-type zinc-finger protein family. Other alias names for Zf9 include BCD1, CBA1, and COPEB.