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Product Information

Peridinin Chlorophyll Protein (PerCP) is a red-emitting fluorescent protein isolated from algae that can be excited by the 488 nm blue laser and captured with a 670/30 nm bandpass filter. PerCP exhibits a large Stokes' Shift, with an excitation peak at 482 nm and an emission peak at 675 nm. PerCP is was historically used in flow cytometry, however it is highly susceptible to photobleaching and has poor stability. Alternatives like BB700, NovaFluor Blue 690 or PerCP-eFluor™ 710 are preferred. PerCP is a generic dye that has no sole manufacturer.

Benefits of PerCP

  • Ideal for cell imaging

    • Applied to most fluorescent-based instruments

    • Stable conjugation with Streptavidin, primary and secondary antibodies.

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  • Ensure result accuracy

    • ​Bright Index: Level 5 with high quantum yield

    • Won't penetrate into the cell and cause a false-positive reaction

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  • Stability

    • Minimal fluorescence quenching

    • Non-toxic, less chance of affecting characteristics of the sample, human body, and environment

Peridinin-Chlorophyll-Protein（PerCP）
*With 50 mM Tris-HCl, 15 mM Sodium Azide
Size: 5, 100, 500 mg, 1 Gram or bulk
  • Are phycobiliproteins stored in PBS with ammonium sulfate different?
    PBPs in different buffer solutions both exhibit good long-term stability, the form with ammonium sulfate requires more purification processes, such as dialysis or sulfate precipitation, to fully remove the ammonium sulfate prior to making tandem dyes and antibody conjugations. Home Algae Biotech offers phycobiliproteins stored in PBS with ammonium sulfate buffer solutions.
  • Is the conjugation reaction linking the R-PE/APC to free sulfhydryl groups on the antibody?
    Home Algae's R-PE & APC Labeling Kit are SH-reactive labeling kits. Crosslinked R-PE and APC have maleimide (-NH2) groups that easily react with sulfhydryl (-SH) groups of target antibody without the need for additional activation. The maleinide group of R-PE/APC and sulfhydryl group on the antibody form a covalent bond during conjugation. Users can also use crosslinked R-PE & APC to label other molecules that have free sulfhydryl groups.
  • Do I need to remove the free R-PE from the R-PE-antibody conjugate?
    After the conjugation procedures, reaction mixture should contain mostly the R-PE-antibody conjugate, with small amounts of unconjugated R-PE and antibody. Unconjugated R-PE should not interfere with the assay result. However, purification is suggested for labeling up to 1 mg of antibody. Please contact us for more technical advice.
  • Can I purchase large pack of labeling kit and separate them into small vials on my own for several reactions?
    Yes, all pack sizes of our labeling kits are scalable and can be separated into small packs based on your experiment requirements.
  • What are the molecular weight of purified R-PE and APC?
    The molecular weight of purified R-PE is 240 kDa, and for purified APC is 105 kDa. They are both perfect for detecting cell surface antigens to further conduct cell screening and cell imaging. With high molecular weight, PE and APC won't penetrate into the cell sample even if cell membrane ruptured, which greatly lower the risk of false-positive reaction. It should be noted that the relatively high molecular weight of R-PE may preclude its use in procedures requiring good penetration into cells and tissues. It is predominantly intended for surface labeling of cells for flow cytometry.
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