Abstract: An application of SCFV protein in preparation of a CAR gene expression vector is disclosed. The protein sequence of the SCFV protein is shown in SEQ ID No. 1. The 1st˜21st amino acids are the extracellular signal peptide amino acid sequences. The 22nd˜31st amino acids are Flag amino acid sequences. And the remaining sequences are CXCR4 scfv sequences. An application of the gene sequence encoding the SCFV protein in preparation of a CAR gene expression vector is disclosed, and the gene sequence is shown in SEQ ID No.2. A CAR gene expression vector and a CAR-T cell are disclosed. The expression vector is plent-EF1a-Flag-CXCR4 CAR, and CAR-T cells are used in the preparation of a drug for a targeted therapy of tumor cells with high expression of CXCR4.

Abstract: The present invention concerns a method for preparing antigen binding proteins specific for PCSK9 with reduced viscosity. The method proceeds by replacing residues in high viscosity variable domain subfamilies with residues in correlating low viscosity subfamilies. The method further comprises substituting residues in the Fc domain with residues associated with low viscosity and adding charged residues to the C-terminus of the Fc domain. The present invention further concerns antigen binding proteins produced by this method.

Abstract: An antibody or antigen-binding fragment thereof is disclosed. The antibody or antigen-binding fragment thereof binds to HER2 expressed on a cancer cell or a fragment of the HER2. A HER2-targeting agent containing any of the antibody or antigen-binding fragment thereof, and a pharmaceutical composition containing the HER2-targeting agent are disclosed.

Abstract: An antibody targeting Galectin-9 is provided as are methods of using the same treatment of chronic immune conditions such as infections, inflammatory diseases and cancer, in particular malignant mesothelioma.