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[엘바이오시스템] [독일 IBA] Detection of Strep-tag® fusion proteins
제품(기술)분류: 실험대행기술 > 기타
전화: 031-229-3350
메일: lbs_reagents(at).daum.net
팩스: 031-229-3351

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Detection of Strep-tag® fusion proteins

Two different detection systems are provided:

  1. detection via Strep-Tactin® conjugates (for Strep-/Twin-Strep-tag® proteins)
  2. detection via monoclonal antibodies against Strep-/Twin-Strep-tag® or His-tag

Read which detection system is suitable for your applications:

       Western blot

For direct detection of Strep-tag® fusion proteins in Western blots

  • via chromogenic and/or chemiluminescence reaction (no secondary antibody needed!) use
    - Strep-Tactin
    ® HRP conjugate (HRP, horseradish peroxidase)
    - StrepMAB-Classic HRP conjugate

  • via chromogenic reaction
    - Strep-Tactin® AP conjugate (AP, alkaline phosphatase)


    For protein detection in ELISA use

  • StrepMAB-Classic, unconjugated

  • Strep-Tactin® HRP conjugate


    Visualize your Strep-tag® protein with the following dyes:

    Strep-Tactin® , StrepMAB-Classic and StrepMAB-Immo are available with single fluorescent conjugates at different  wavelengths (488 nm, 546 nm, 645 nm):

  • Strep-tag® fluorescent Chromeo 488 conjugates of Strep-Tactin®, StrepMAB Classic and StrepMAB Immo (50 µg each)

  • Strep-tag® fluorescent Chromeo 546 conjugates of Strep-Tactin®, StrepMAB Classic and StrepMAB Immo (50 µg each)

  • Strep-tag® fluorescent Oyster 645 conjugates of Strep-Tactin®

    (50 µg)


    For staining (Twin-)-Strep-tagged proteins in FACS we recommend to use our Strep-Tactin® PE 6-5001-005 or Strep-Tactin® APC 6-5011-005 conjugates, because they lead to a more intensive staining compared with our Oyster and Chromeo dyes and are therefore better suited for a light sensitive application as FACS.

    50 μl conjugate are good for staining of approximately 5x107to 1x108 cells.
    Use Strep-Tactin PE / APC as follows:

    - Wash 5x106 pre-cooled cells with 10 ml of a biotin-free physiological wash buffer in a 15 ml reaction tube to remove potentially interfering  ingredients (e.g. biotin).

    - Resuspend the cells in 50 μl wash buffer and transfer cells to a reaction vessel suitable for staining, e.g. a 96-well round bottom microtiter plate.

    - Add 5 µl Strep-Tactin®PE (or Strep-Tactin®APC) to the cells and mix thoroughly by gentle pipetting.

    - Incubate for 20 minutes at 4°C in the dark.

    - Wash cells three times (400xg, 2 min) in 200 μl wash buffer.

    - Cells are ready for FACS

    Note: The staining intensity depends on the concentration of tagged protein and in case of unsatisfying results the concentration of conjugate has to be adjusted.

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