Efficient evolved antibody mimetic designed ankyrin repeat proteins against programmed death-ligand 1 on E. coli surface display

Designed ankyrin repeat proteins (DARPins) are a kind of proteins containing the similar characteristics to antibodies. Which can specifically bind the target with high affinity. Here, we described an efficient method to select of DARPins effectively against the programmed death-ligand 1(PD-L1), a prominent target for cancer immune therapy, by E. coli surface display. E. coli surface display combined with magnetic cell sorting (MACS) were easy...