To what does avidin directly bind with high affinity?

Question

Quizplus · Accepted Answer

Avidin is a protein that specifically binds biotin with high affinity. This interaction is widely used in biotechnology applications like protein purification, conjugation, and detection, among others. Avidin has four identical binding sites that give rise to its strong interaction with biotin. Avidin's affinity for biotin is one of the strongest known non-covalent interactions, with a dissociation constant (Kd) in the femtomolar range.

To What Does Avidin Directly Bind with High Affinity