Recombinant streptavidin 3(r-SA3) is modified at the molecular level on the basis of natural streptavidin to greatly weaken the affinity with biotin (Kd ≈ 10-8M), while maintaining the tetramer structure, which can realize reversible binding and dissociation with biotin, and can be used for mild separation, purification and recycling of biotinylated proteins, antibodies, nucleic acids and other substances. r-SA3 containing cysteine in the molecule, directional coupling can be achieved under certain conditions.

Size: 1 mg, 10 mg, 100 mg, 500 mg, 1g
Formulation: Lyophilized powder, 5mM PB(pH 7.4) solution before lyophilization
Mol. Wt.：16.7 kDa
Theory pI：6.06
Purity：≥95%（SDS-PAGE）
Concentration determination: UV absorption method, extinction coefficient E(0.1% at 280 nm) = 2.51
Resources: Escherichia coli (E. coli)
Storage Condition: -20 ℃
Conditions of transport: Ambient Temp
Storage Duration: 3 years