Fig. 1From: The artificial amino acid change in the sialic acid-binding domain of the hemagglutinin neuraminidase of newcastle disease virus increases its specificity to HCT 116 colorectal cancer cells and tumor suppression effectDirected evolution. (A) Schematic diagram of directed evolution technology to construct an H domain protein with the improved binding affinity to cancer cells. (B) Schematic diagram of the H-domain-avidin protein. H-domain, the globular head domainBack to article page