A protein found in uncooked egg white that binds to and inactivates biotin. An abundance of avidin in the duct can result in a deficiency of biotin.

• 抗生物素蛋白卵清中发现的一种蛋白质，它可与生物素结合并使生物素活性减低。导管中抗生物素蛋白过量可导至生物素的缺乏。