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a protein, found in the white of egg, that combines with and prevents the action of biotin, thus injuring the animal that consumes it in excess by producing biotin deficiency.
a protein, found in egg-white, that combines with biotin to form a stable compound that cannot be absorbed, leading to a biotin deficiency in the consumer

avidin av·i·din (āv’ĭ-dĭn)
A protein, found in uncooked egg white, that binds to and inactivates biotin and which, when present in abundance, can result in a deficiency of biotin.


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