Streptavidin n is a 52.8 kDa protein purified from the bacterium Streptomyces avidinii. Streptavidin homo-tetramers have an extraordinarily high affinity for biotin (also known as vitamin B7 or vitamin H). With a dissociation constant (Kd) on the order of ≈10−14 mol/L, the binding of biotin to streptavidin is one of the strongest non-covalent ...
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http://en.wikipedia.org/wiki/Streptavidin
A small bacterial protein that binds with high affinity to the vitamin biotin. This streptavidin-biotin combination can be used to link molecules such as radioisotopes and monoclonal antibodies together. These bound products have the property of being attracted to, and attaching to, cancer cells, rather than normal cells. The radiolabeled products ...
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http://www.cancer.gov/dictionary?expand=S
<protein> Analogue of avidin. A protein isolated from Streptomycetes avidinii that has a high affinity for biotin. Used to detect biotin markers. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973
Analogue of avidin. A protein isolated from Streptomycetes avidiniithat has a high affinity for biotin. Used to detect biotin markers.
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http://www.encyclo.co.uk/visitor-contributions.php
Type: Term Pronunciation: strep′ta-vī′din Definitions: 1. A bacterial protein used as a probe in immunologic assays because of its strong affinity and specificity for biotin; streptavidin is used as a bridge to link a chromogen to a biotinylated substrate specific for the substance of interest.
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http://www.medilexicon.com/medicaldictionary.php?t=85416
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