(2-Pyridyldithio)-PEG4-propargyl

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  Catalog No.: SP-F-0158

  Description: Immunoassays (such as histochemistry, ELISAs and Western blotting) are important in clinical diagnosis and experimental protein analysis. These indirect analytical strategies primarily rely on the binding of an antigen by a specific antibody (primary antibody), followed by the detection of primary antibody by an enzyme or fluorescently labelled secondary antibody, allowing the semi-quantitative detection of a protein of interest. Histochemistry, ELISAs and Western blotting have been the common choices for protein validation studies for the past several decades. Technical advancements and modifications are continuously being developed to enhance the detection sensitivity of these procedures. Among them, streptavidin-containing poly-horseradish peroxidase (PolyHRP) based detection strategies have been shown to improve signals in a variety of immunoassays. The commercially available streptavidin and antibodies conjugated with many HRPs (PolyHRPs) have been widely used to enhance the detection sensitivity in immunoassays.

  Selectoprobe™ polyHRP-Streptavidin Conjugate is compatible with chromogenic, fluorogenic and chemiluminescent HRP substrates used in ELISA, Western blotting, immunohistochemistry (IHC) and nucleic acid hybridization assays. Due to the extremely high sensitivity of Selectoprobe™ polyHRP-Streptavidin Conjugate a blocking procedure may been needed to eliminate the interference caused by the endogenous biotinylated proteins.

  Storage: Refrigerated (2-8 °C); Minimize light exposure

   

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  Clickable cholesterol (alkyne)

  Catalog No: SP-C-0008
  Purity: 97%
  CAS No: 949584-04-7
  Synonym: Cholest-5-en-3-ol (3β)-,3-(5-hexynoate)
  MW: 480.78
  Formula: C₃₃H₅₂O₂

   

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  Azido-PEG4-Val-Cit-PAB-OH

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  Purity: 98%
  CAS No: 2055024-64-9
  MW: 652.74
  Formula: C₂₉H₄₈N₈O₉

   

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  Selectoprobe™ Eu-streptavidin conjugate

  Catalog No.: SP-F-0149

  Description: This lyophilized Selectoprobe™ Eu-streptavidin conjugate comprises streptavidin (as the biotin-binding protein) with Selectoprobe™ Eu covalently attached (as the time-resolved red fluorescent europium label). It is commonly used as a second step reagent for indirect immunofluorescent staining, when used in conjunction with biotinylated primary antibodies. It is a very valuable tool for biotin-streptavidin-based biological assays and tests using TR-FRET platform. A variety of the complementary biotinylated reagents are available from Selectoprobe™.

  Storage: Freeze (< -15 °C); Minimize light exposure

  Correction Factor (260 nm)	0.911
  Correction Factor (280 nm)	0.777
  Extinction coefficient (cm -1 M -1)	21000
  Excitation (nm)	298
  Emission (nm)	617

  $3,690.00 – $35,960.00Price range: $3,690.00 through $35,960.00 Select options This product has multiple variants. The options may be chosen on the product page