ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,948, issued on July 21, was assigned to DDBIO.CO, LTD., (SHANG HAI) (Shanghai).

"Construction method and application of antigen-specific binding polypeptide gene display vector" was invented by Chen Zhou (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed in the present application is a method for constructing an antigen-specific binding polypeptide gene display vector. The method comprises processing by using a restriction endonuclease that specifically recognizes a restriction site to obtain four nucleic acid fragments having specific sticky ends, and then enabling the nucleic acid fragments to directionally ligate. Further disclose...