Streptavidin

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Notion

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Science and technology

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What Wikipedia says

Streptavidin is a 52 kDa protein (tetramer) purified from the bacterium Streptomyces avidinii. Streptavidin homo-tetramers have an extraordinarily high affinity for biotin (also known as vitamin B7 or vitamin H).

Excerpt from the Wikipedia article “Streptavidin”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Jawahar Swaminathan and MSD staff at the European Bioinformatics Institute, Public domain, via Wikimedia Commons.