Western blot analysis of human kidney tissue lysate using CD13 Mouse Monoclonal Antibody (APN/6998).
Formalin-fixed, paraffin-embedded human tonsil stained with CD13 Mouse Monoclonal Antibody (APN/6998). HIER: Tris/EDTA, pH9.0, 45min. 2°: HRP-polymer, 30min. DAB, 5min.
Formalin-fixed, paraffin-embedded human kidney stained with CD13 Mouse Monoclonal Antibody (APN/6998). Inset: PBS instead of primary antibody; secondary only negative control.
Formalin-fixed, paraffin-embedded human prostate stained with CD13 Mouse Monoclonal Antibody (APN/6998). Inset: PBS instead of primary antibody; secondary only negative control.
Known Applications & Suggested Dilutions
Host / Ig Isotype
Mol. Weight of Antigen
Specificity & Comments
Recognizes an integral membrane glycoprotein of 150kDa, identified as CD13 (also known as aminopeptidase-N). The antibody recognizes an extracellular epitope. The CD13 antigen is present on most cells of myeloid origin including granulocytes, monocytes, mast cells, and GM-progenitor cells. It is also expressed by the majority of AML, CML in myeloid blast crisis, and in a smaller fraction of lymphoid leukemias. CD13 is absent from normal lymphocytes, platelets and erythrocytes. CD13 is also present on fibroblasts; endothelial cells, epithelial cells from renal proximal tubules and intestinal brush border, bone marrow stromal cells, osteoclasts, and cells lining bile duct canaliculi. CD13 is identical to aminopeptidase N (APN), a prominent membrane-bound metalloprotease present on the surface of intestinal brush border and renal tubules. CD13 plays a role in metabolism of biologically active peptides, in phagocytosis, and in bactericidal / tumoricidal activities. It also serves as a receptor for human coronaviruses (HCV). The lineage-restricted pattern of expression of CD13 within the hemopoietic compartment suggests that it may be important in myeloid cell differentiation.