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CD68/SR-D1 Antibody (SPM130) - Azide and BSA Free, Novus Biologicals

Bio-Techne includes Novus Biologicals | Catalog # NBP2-34736

Key Product Details

Species Reactivity

Human, Canine (Negative), Chicken (Negative), Feline, Monkey, Porcine (Negative), Rabbit


CyTOF-ready, Flow Cytometry, Immunocytochemistry/ Immunofluorescence, Immunohistochemistry, Immunohistochemistry-Frozen, Immunohistochemistry-Paraffin



Antibody Source

Monoclonal Mouse IgG1 kappa Clone # SPM130


Azide and BSA Free


1.0 mg/ml

Product Summary for CD68/SR-D1 Antibody (SPM130) - Azide and BSA Free


Subcellular fraction of human alveolar macrophages

Reactivity Notes

Does not react with Porcine, Canine or Chicken.


Cell Surface and Cytoplasmic


This antibody recognizes a glycoprotein of 110kDa, which is identified as CD68. It is important for identifying macrophages in tissue sections. It stains macrophages in a wide variety of human tissues, including Kupffer cells and macrophages in the red pulp of the spleen, in lamina propria of the gut, in lung alveoli, and in bone marrow. It reacts with myeloid precursors and peripheral blood granulocytes. It also reacts with plasmacytoid T cells, which are supposed to be of monocyte/macrophage origin. It shows strong granular cytoplasmic staining of chronic and acute myeloid leukemia and also reacts with rare cases of true histiocytic neoplasia. Lymphomas are negative or show few granules.


Macrophage Marker






IgG1 kappa

Theoretical MW

110 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.


1.0 mg/ml of antibody purified from Bioreactor Concentrate by Protein A/G. Prepared in 10mM PBS WITHOUT BSA & azide. Also available at 200 ug/ml WITH BSA & azide (NBP2-32831).

Antibody with azide - store at 2 to 8C. Antibody without azide - store at -20 to -80C. Antibody is stable for 24 months. Non-hazardous.

Scientific Data Images for CD68/SR-D1 Antibody (SPM130) - Azide and BSA Free

Immunohistochemistry: CD68/SR-D1 Antibody (SPM130) - Azide and BSA Free [NBP2-34736] - Intrapulmonary heterogeneity of SARS-CoV-2 host response. Selection of ROIs. Left) SARS-CoV-2 RNA-ISH staining was used to guide ROI selection of viral positive and viral negative regions. (Scale bar = 2 mm). Right) multi-color immunofluorescence staining for CD45/red (NBP2-34527AF647), CD68/yellow (NBP2-34736AF594), PanCK/green, and DNA/blue were used in parallel to select ROIs. (Scale bar = 2 mm). Example ROIs are shown in insets. (Scale bar = 100 um). Image collected and cropped by CiteAb from the following publication (// licensed under a CC-BY license.
Flow Cytometry: CD68/SR-D1 Antibody (SPM130) - Azide and BSA Free [NBP2-34736] - Mouse peripheral blood cells were unstained (left) or stained (right) with CD68/SR-D1 antibody and anti-biotin alexa-fluor 488 secondary antibody. Image from verified customer review.
Immunohistochemistry-Paraffin: CD68/SR-D1 Antibody (SPM130) - Azide and BSA Free [NBP2-34736] - Formalin-fixed, paraffin-embedded human tonsil (20X) stained with CD68 MAb (SPM130).

Applications for CD68/SR-D1 Antibody (SPM130) - Azide and BSA Free

Recommended Usage

Flow Cytometry

0.5-1ug/million cells

Immunocytochemistry/ Immunofluorescence



0.5-1ug/mlimmunohistochemistry-Paraffin 0.5-1ug/ml


Application Notes
Immunohistochemistry (Formalin-fixed): 1-2ug/ml for 30 minutes at RT. Staining of formalin-fixed tissues requires heating tissue sections in 10mM Tris with 1mM EDTA, pH 9.0, for 45 min at 95C followed by cooling at RT for 20 minutes.
Optimal dilution for a specific application should be determined.
Please Note: Optimal dilutions of this antibody should be experimentally determined.

Published Applications

Read 1 publication using NBP2-34736 in the following applications:

Formulation, Preparation, and Storage


Protein A or G purified


10 mM PBS


Azide and BSA Free


No Preservative


1.0 mg/ml


The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store at -20 to -80C. Avoid freeze-thaw cycles.

Background: CD68/SR-D1

Human CD68, also known as GP110, LAMP4, Scavenger Receptor D1 (SR-D1) or macrosialin in mouse, encodes a 110-kD transmembrane glycoprotein that belongs to the lysosomal/endosomal-associated membrane glycoprotein (LAMP) family. Members of the LAMP family include LAMP-1, LAMP-2, dendritic cell (DC)-LAMP (aka CD208), and brain and dendritic cell-associated (BAD)-LAMP (aka LAMP-5). Unlike the two LAMP domains facing the lysosomal lumen in LAMP-1 and LAMP-2, CD68 has a single LAMP domain containing four cystines spaced 36-37 residues apart along with an N-terminal Mucin-like domain. The 354 amino acid (a.a.) human CD68 and 326 a.a. murine ortholog share 80.6% a.a. sequence identity (1).

CD68 is highly expressed in cells of the mononuclear phagocyte system such as macrophages, microglia, osteoclasts, and myeloid dendritic cells (DCs); and is expressed to a lesser extent in lymphoid cells (CD19+ B lymphocytes and CD4+ T lymphocytes), human umbilical cord mesenchymal stem cells (MSCs), fibroblasts, endothelial cells, multiple non-hematopoietic cancer cell lines, and human arterial intimal smooth muscle cells (SMCs). Expression has been also observed in diseased states for granulocytes and neutrophils, in particular basophils from myeloproliferative disorders and intestinal neutrophils from inflammatory bowel disease (IBD), respectively (1).

Although the function of CD68 has yet to be established, it has often been used as an immunohistochemistry (IHC) marker of inflammation and for granular cell tumors (GCTs). CD68+ tumor associated macrophages (TAMs) has been suggested to be a predictive marker for poor cancer prognosis, but a meta-analysis showed the presence of CD68 is not correlated with survival (2). In addition, a role in hepatic malaria infection has been reported based on the finding that peptide P39 binds CD68, considered a receptor for malaria sporozoite, and inhibits parasite entry into Kupffer cells. CD68 was deemed a member of the Scavenger receptor family due to its upregulation in macrophages following inflammatory stimuli, ability to bind modified LDL, phosphatidylserine, and apoptotic cells, as well as shuttling between the plasma membrane and endosomes. CD68 has been linked to atherogenesis based on binding and internalization of its ligand, oxLDL (1).


1. Chistiakov, DA, Killingsworth, MC, Myasoedova, VA. Orekhov AN, Bobryshev YV. (2017) CD68/macrosialin: not just a histochemical marker. Lab Invest. 97:4-13. PMID: 27869795

2. Troiano G, Caponio VCA, Adipietro I, Tepedino M, Santoro R, Laino L, Lo Russo L, Cirillo N, Lo Muzio L. (2019) Prognostic significance of CD68+ and CD163+ tumor associated macrophages in head and neck squamous cell carcinoma: A systematic review and meta-analysis. Oral Oncol. 93:66-75. PMID: 31109698.

Alternate Names

CD68, gp110, Macrosialin, SCARD1, SR-D1, SRD1

Gene Symbol


Additional CD68/SR-D1 Products

Product Documents for CD68/SR-D1 Antibody (SPM130) - Azide and BSA Free

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Product Specific Notices for CD68/SR-D1 Antibody (SPM130) - Azide and BSA Free

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.