Avidin is a tetrameric protein commonly isolated from egg whites. Avidin binds to biotin with strength approaching that of a covalent bond. Disruption of the avidin-biotin bond occurs only under extraordinary conditions, such as pH 1.5 with 6 M guanidium hydrocholoride. Fluorescent avidin can bind to biotinylated antibodies used in immunohistochemistry and immunocytochemistry. Avidin thiol can bind to gold surfaces and act as a glue for biotinylated proteins. Avidin agarose is useful for efficient removal of biotinylated proteins from a liquid phase.
Streptavidin is similar to avidin in that it binds biotin and exists as a tetramer. Streptavidin’s primary advantage is that it less charged under neutral conditions and is therefore less likely to be involved in unwanted ionic interactions.
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Streptavidin azide
Price range: $199.10 through $579.00 Select options This product has multiple variants. The options may be chosen on the product page -
Neutravidin thiol
Price range: $247.50 through $464.20 Select options This product has multiple variants. The options may be chosen on the product page -
Streptavidin (without modification)
Price range: $52.80 through $161.70 Select options This product has multiple variants. The options may be chosen on the product page -
Streptavidin CY5.5
Price range: $82.50 through $161.70 Select options This product has multiple variants. The options may be chosen on the product page -
Streptavidin CY5
Price range: $82.50 through $161.70 Select options This product has multiple variants. The options may be chosen on the product page -
Streptavidin CY3
Price range: $82.50 through $161.70 Select options This product has multiple variants. The options may be chosen on the product page -
Streptavidin TRITC
Price range: $82.50 through $156.20 Select options This product has multiple variants. The options may be chosen on the product page -
Streptavidin-fluorescein (FITC)
Price range: $49.00 through $105.00 Select options This product has multiple variants. The options may be chosen on the product page -
Streptavidin thiol
Price range: $199.10 through $776.60 Select options This product has multiple variants. The options may be chosen on the product page -
Avidin CY3
Price range: $88.00 through $187.00 Select options This product has multiple variants. The options may be chosen on the product page -
Avidin CY5
Price range: $88.00 through $187.00 Select options This product has multiple variants. The options may be chosen on the product page -
Avidin (without modification)
Price range: $25.30 through $327.80 Select options This product has multiple variants. The options may be chosen on the product page -
Avidin Sepharose
Price range: $66.00 through $379.50 Select options This product has multiple variants. The options may be chosen on the product page -
Avidin thiol
Price range: $88.00 through $819.50 Select options This product has multiple variants. The options may be chosen on the product page -
Avidin CY5.5
Price range: $88.00 through $434.50 Select options This product has multiple variants. The options may be chosen on the product page -
Avidin-fluorescein
Price range: $55.00 through $550.00 Select options This product has multiple variants. The options may be chosen on the product page
