Recombinant Protein;Rat FcRn/FCGRT & B2M Heterodimer Protein;1MG;Rat FcRn / FCGRT & B2M Heterodimer Protein, Ala 23 - Ser 298 (FCGRT, NP_203502.1) and & Ile 21 - Met 119 (B2M, NP_036644), was produced in human 293 cells (HEK293) at ACRObiosystems.;Rat FcRn / FCGRT & B2M Heterodimer Protein, produced by co-expression of FCGRT and B2M, has a calculated MW of 31.8 kDa (FCGRT) and 13.1 kDa (B2M). Subunit FCGRT is fused with his-tag at the C-terminus and subunit Beta-2 microglobulin (B2M) is fused with Strep II-tag at the C-terminus. The predicted N-terminus is Ala 23 (FCGRT) & Ile 21 (B2M). The reducing (R) protein migrates as 45-50 kDa (FCGRT) and 14.5 kDa (B2M) respectively due to different glycosylation.