What is streptavidin HRP used for?
Streptavidin-HRP is useful for detecting biotinylated antibodies, e.g., in ELISA, ELISPOT, IHC or Western blotting. For ELISA applications, HRP will act on soluble substrates, such as ABTS or TMB, to yield a colorimetric reaction.
Is streptavidin HRP sensitive to light?
Yes HRP is light sensitive. It is important to avoid excessive exposure to light, Therefore using dark moisture chember is very useful during these steps.
How do you make HRTA streptavidin?
Wash membrane-bound HRP (antibody conjugate) three times for 5 minutes in TBST. Prepare 1X SignalFire™ ECL Reagent (#6883) by diluting one part 2X Reagent A and one part 2X Reagent B (e.g. for 10 ml, add 5 ml Reagent A and 5 ml Reagent B). Mix well.
What does horseradish peroxidase do?
Horseradish peroxidase (HRP) is an enzyme used to amplify signal in photometric assays by catalyzing the conversion of chromogenic or chemiluminescent substrates for the detection of targets such as proteins, carbohydrates, and nucleic acids.
Is streptavidin a secondary antibody?
Fluorescent secondary antibodies and streptavidin conjugates are used for the indirect detection of target antigens in many applications including fluorescent cell imaging, western blotting, immunohistochemistry and more.
Does HRP bind to biotin?
Streptavidin binds to biotin and the conjugated HRP provides enzyme activity for detection using an appropriate substrate system. This particular product has been used primarily in sandwich ELISA applications to provide consistent measurement of biotinylated detection antibodies.
What is a chromogenic substrate?
Chromogenic substrates are peptides that react with proteolytic enzymes under the formation of color. They are made synthetically and are designed to possess a selectivity similar to that of the natural substrate for the enzyme.
Why does TMB turn blue?
TMB turns blue in presence of H2O2 and Peroxidase. Sometimes metals also act as peroxidase mimic. Just avoid any peroxide and peroxidase in proximity. You should consider preparing a fresh stock.
