Summary: Cat.No. : Il4r-379R Product Overview : Recombinant Rat Il4r (Q63257-1) (Met1-Arg232), fused with the Fc region of human IgG1 at the C-terminus, was produced in Human Cells. Source : Human Cells Species : Rat Tag : Fc Predicted N Terminal : Ile 26 Form : Lyophilized from sterile PBS, pH 7.4.Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization.