Recombinant Human Antibody (R3Mab) is capable of binding to FGFR3, expressed in HEK 293 cells. Expressed as the combination of a heavy chain (HC) containing VH from anti-FGFR3 mAb and CH1-3 region of human IgG1 and a light chain (LC) encoding VL from anti-FGFR3 proteins mAb and CL of human kappa light chain. Exists as a disulfide linked dimer of the HC and LC hetero-dimer under non-reducing condition. This antibody inhibited not only WT FGFR3, but also various mutants of the receptor.
Figure 1 Blocking of R3Mab to FGF-FGFR3 interaction.
(A) Selective binding of human FGFR3 by R3Mab. Human FGFR1–4 Fc chimeric proteins were immobilized and incubated with increasing amounts of R3Mab. Specific binding was detected using an anti-human Fab antibody. (B and C) Blocking of FGF1 binding to human FGFR3-IIIb (B) or -IIIc (C) by R3Mab. Specific binding was detected by using a biotinylated FGF1-specific polyclonal antibody. (D and E) Blocking of FGF9 binding to human FGFR3-IIIb (D) or -IIIc (E) by R3Mab. Specific binding was detected by using a biotinylated FGF9-specific polyclonal antibody. Error bars represent SEM and are sometimes smaller than symbols.
Qing, J., Du, X., Chen, Y., Chan, P., Li, H., Wu, P., ... & Ross, S. (2009). Antibody-based targeting of FGFR3 in bladder carcinoma and t (4; 14)-positive multiple myeloma in mice. The Journal of clinical investigation, 119(5), 1216-1229.
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(Creative Biolabs Cat# PABL-474, RRID: AB_3111659)
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