Anti-Ki-67 Antibody

This rabbit polyclonal reagent targets the Ki-67 nuclear proliferation antigen, a non-histone protein that is expressed during the active phases of the cell cycle (G1, S, G2, and M) but absent from quiescent G0 cells. Produced by Antibodies.com as an unconjugated primary antibody, it is supplied in a 100 µl vial and validated across western blot, immunohistochemistry, immunofluorescence, and ELISA workflows. The antibody binds the human Ki67 epitope and is widely deployed in pathology laboratories to score mitotic indices in tumor sections, where the proliferative fraction correlates with disease aggressiveness in breast carcinoma, neuroendocrine neoplasms, and lymphoid malignancies. Researchers use it to distinguish actively dividing cells from post-mitotic populations in tissue sections, supporting studies on tumor grading, cell cycle regulation, and regenerative biology. Each preparation is affinity-purified from rabbit serum, providing consistent lot-to-lot performance for longitudinal research programs and routine clinical-research immunohistochemistry panels.