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CD14 (61D3) Mouse mAb (PE-Cy7® Conjugate)
Antibody Conjugates

CD14 (61D3) Mouse mAb (PE-Cy7® Conjugate) #44947

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Flow cytometric analysis of live human peripheral blood mononuclear cells using CD14 (61D3) Mouse mAb (PE-Cy7® Conjugate) (solid line) compared to concentration-matched Mouse (MOPC-21) mAb IgG1 Isotype Control (PE-Cy7® Conjugate) #79339 (dashed line). Analysis was performed on cells in the monocyte gate.

To Purchase # 44947S
Product # Size Price
500 µl  (100 tests) $ 336

Supporting Data

MW (kDa)
Isotype Mouse IgG1

Product Description

This Cell Signaling Technology antibody is conjugated to PE-Cy7® and tested in-house for direct flow cytometry analysis in human cells.

Product Usage Information

Application Dilutions
Flow Cytometry 1:20


Supplied in 10 mM NaH2PO4, 150 mM NaCl, 0.09% NaN3, 0.1% gelatin, pH7.2. This product is stable for 6 months when stored at 4°C. Do not aliquot the antibody. Protect from light. Do not freeze.



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Flow Cytometry, Live Cell Protocol for Directly Conjugated Antibodies

A. Solutions and Reagents

NOTE: Prepare solutions with reverse osmosis deionized (RODI) or equivalent grade water.

  1. 1X Phosphate Buffered Saline (PBS): To prepare 1 L 1X PBS: add 100 ml 10X PBS (#12528) to 900 ml water, mix.
  2. Antibody Dilution Buffer: Purchase ready-to-use Flow Cytometry Antibody Dilution Buffer (#13616), or prepare a 0.5% BSA PBS buffer by dissolving 0.5 g Bovine Serum Albumin (BSA) (#9998) in 100 ml 1X PBS. Store at 4°C.

NOTE: When including fluorescent cellular dyes in your experiment (including viability dyes, DNA dyes, etc.), please refer to the dye product page for the recommended protocol. Visit for a listing of cellular dyes validated for use in flow cytometry.

B. Immunostaining

NOTE: Count cells using a hemocytometer or alternative method.

NOTE: If using whole blood, lyse red blood cells and wash by centrifugation prior to Immunostaining.

NOTE: Optimal centrifugation conditions will vary depending upon cell type and reagent volume. Generally, 150-300g for 1-5 minutes will be sufficient to pellet the cells.

  1. Aliquot desired number of cells into tubes or wells. (Generally, 5x105 to 1x106 cells per assay.)
  2. Pellet cells by centrifugation and remove supernatant.
  3. Resuspend cells in 100 µl of diluted primary antibody, prepared in Antibody Dilution Buffer at a recommended dilution or as determined via titration.
  4. Incubate for 30 min to 1 hr on ice. Protect from light.
  5. Wash by centrifugation in Antibody Dilution Buffer. Discard supernatant. Repeat.
  6. Resuspend cells in 200-500 µl of Antibody Dilution Buffer and analyze on flow cytometer.

posted June 2017

revised August 2019

Protocol Id: 1504

Specificity / Sensitivity

CD14 (61D3) Mouse mAb (PE-Cy7® Conjugate) recognizes endogenous levels of total CD14 protein. This antibody detects an epitope within the extracellular domain.

Species Reactivity:


Source / Purification

This monoclonal antibody was purified from tissue culture supernatant via affinity chromatography. The purified antibody was conjugated under optimal conditions, with unreacted dye removed from the preparation.


CD14 is a leucine-rich repeat-containing pattern recognition receptor with expression largely restricted to the monocyte/macrophage cell lineage (1). Research studies have shown that CD14 is a bacterial lipopolysaccharide (LPS) binding glycoprotein, expressed as either a GPI-linked membrane protein or a soluble plasma protein (2). LPS induces an upregulation of GPI-linked CD14 expression, which facilitates TLR4 signaling and macrophage activation in response to bacterial infection (3-5).

The 61D3 antibody is widely used to identify cells of the monocyte/macrophage lineage (6)

  1. Wright, S.D. et al. (1991) J Exp Med 173, 1281-6.
  2. Ziegler-Heitbrock, H.W. and Ulevitch, R.J. (1993) Immunol Today 14, 121-5.
  3. Suzuki, M. et al. (2009) J Immunol 182, 6485-93.
  4. Pugin, J. et al. (1994) Immunity 1, 509-16.
  5. Zanoni, I. et al. (2011) Cell 147, 868-80.
  6. Flora, P.K. and Gregory, C.D. (1994) Eur J Immunol 24, 2625-32.

Pathways & Proteins

Explore pathways + proteins related to this product.

For Research Use Only. Not For Use In Diagnostic Procedures.

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
Cy and CyDye are registered trademarks of GE Healthcare.