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RB545 Mouse Anti-Human uPA (PLAU)

BD OptiBuild™ RB545 Mouse Anti-Human uPA (PLAU)

Clone UK98/6 (also known as UK 98/6; 98/6)

Product Details
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BD OptiBuild™
ATF; PLAU; U-plasminogen activator; UPA; u-PA; urokinase-type plasminogen activator
Human (Tested in Development)
Mouse BALB/c IgG1, κ
Purified Human Urokinase-type Plasminogen Activator
Flow cytometry (Qualified)
0.2 mg/ml
Aqueous buffered solution containing ≤0.09% sodium azide.

Preparation And Storage

Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze. The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated to the dye under optimum conditions that minimize unconjugated dye and antibody.

Product Notices

  1. Please refer to for technical protocols.
  2. Please observe the following precautions: Absorption of visible light can significantly alter the energy transfer occurring in any tandem fluorochrome conjugate; therefore, we recommend that special precautions be taken (such as wrapping vials, tubes, or racks in aluminum foil) to prevent exposure of conjugated reagents, including cells stained with those reagents, to room illumination.
  3. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
  4. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at
  5. An isotype control should be used at the same concentration as the antibody of interest.
  6. Please refer to to access safety data sheets (SDS).
  7. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
  8. Human donor specific background has been observed in relation to the presence of anti-polyethylene glycol (PEG) antibodies, developed as a result of certain vaccines containing PEG, including some COVID-19 vaccines. We recommend use of BD Horizon Brilliant™ Stain Buffer in your experiments to help mitigate potential background. For more information visit
  9. Researchers should determine the optimal concentration of this reagent for their individual applications.
  10. The production process underwent stringent testing and validation to assure that it generates a high-quality conjugate with consistent performance and specific binding activity. However, verification testing has not been performed on all conjugate lots.
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Antibody Details
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The UK98/6 monoclonal antibody specifically recognizes Urokinase-type Plasminogen Activator (uPA) that is encoded by PLAU (Plasminogen Activator Urokinase). uPA (PLAU) is secreted as an inactive single-chain precursor protein (Pro-urokinase or Pro-uPA) by various cells including vascular endothelial cells, renal epithelial cells, fibroblasts, monocytes, macrophages, smooth muscle cells and tumor cells of different origin. Following proteolytic cleavage, two resulting chains are disulfide bonded together with an amino-terminal A-chain (ATF) with EGF-like growth factor and Kringle domains bound to a catalytically active peptidase, the C-terminal B-chain. uPA (PLAU) binds to cell-surface CD87 (also known as, Urokinase Plasminogen Activator Receptor or uPA-R) by its growth factor-like domain. CD87 is widely expressed by monocytes, neutrophils, dendritic cells, activated T cells, NK cells, fibroblasts, endothelial cells, keratinocytes, and some tumor cells. The cell-associated form of uPA (PLAU) efficiently acts upon the plasminogen proenzyme to generate active plasmin which degrades blood plasma proteins and dissolves fibrin blood clots. uPA (PLAU) also activates collagenases that are involved in the breakdown of the extracellular matrix as well as some mediators of the complement system. It may play a role in tumor cell proliferation, migration, and metastases. A specific polymorphism of uPA (PLAU) is associated with late-onset Alzheimer's disease. The UK98-6 antibody can reportedly suppress the biological activity of uPA (PLAU).

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Format Details
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The BD Horizon RealBlue™ 545 (RB545) fluorochrome is part of the BD family of blue (488-nm) laser dyes. It is a small organic fluorochrome with an excitation maximum (Ex Max) at 496-nm and an emission maximum (Em Max) at 545-nm. Driven by BD innovation, RB545 can be used on spectral cytometers and is designed to be excited by the blue (488-nm) laser with minimal excitation by the 561-nm yellow-green laser. RB545 has minimal spillover into yellow-green detectors and a brightness level similar to FITC.  Given its unique emission max, on a spectral instrument RB545 can be used simultaneously with FITC and PE to provide an additional color off of the blue laser. Please ensure that your instrument configuration (lasers and optical filters) is appropriate for this dye.
Blue 488 nm
496 nm
545 nm
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Citations & References
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Development References (6)

  1. Danø K, Andreasen PA, Grøndahl-Hansen J, Kristensen P, Nielsen LS, Skriver L. Plasminogen activators, tissue degradation, and cancer.. Adv Cancer Res. 1985; 44:139-266. (Biology). View Reference
  2. Finckh U, van Hadeln K, Müller-Thomsen T, et al. Association of late-onset Alzheimer disease with a genotype of PLAU, the gene encoding urokinase-type plasminogen activator on chromosome 10q22.2.. Neurogenetics. 2003; 4(4):213-7. (Biology). View Reference
  3. Heidtmann HH, Hofmann M, Jacob E, Erbil C, Havemann K, Schwartz-Albiez R. Synthesis and secretion of plasminogen activators and plasminogen activator inhibitors in cell lines of different groups of human lung tumors.. Cancer Res. 1989; 49(24 Pt 1):6960-5. (Biology: Flow cytometry). View Reference
  4. Meissauer A, Kramer MD, Hofmann M, et al. Urokinase-type and tissue-type plasminogen activators are essential for in vitro invasion of human melanoma cells.. Exp Cell Res. 1991; 192(2):453-9. (Clone-specific: Blocking, ELISA, Functional assay). View Reference
  5. Meissauer A, Kramer MD, Schirrmacher V, Brunner G. Generation of cell surface-bound plasmin by cell-associated urokinase-type or secreted tissue-type plasminogen activator: a key event in melanoma cell invasiveness in vitro.. Exp Cell Res. 1992; 199(2):179-90. (Clone-specific: Blocking, ELISA, Functional assay). View Reference
  6. Schwartz-Albiez R, Heidtmann HH, Wolf D, Schirrmacher V, Moldenhauer G. Three types of human lung tumour cell lines can be distinguished according to surface expression of endogenous urokinase and their capacity to bind exogenous urokinase.. Br J Cancer. 1992; 65(1):51-7. (Immunogen: ELISA, Radioimmunoassay, Western blot). View Reference
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Comparisons, where applicable, are made against older BD Technology, manual methods or are general performance claims.  Comparisons are not made against non-BD technologies, unless otherwise noted.

For Research Use Only. Not for use in diagnostic or therapeutic procedures.