Purity ~90% (SDS-PAGE). Binds to the Fc region of monomeric immunoglobulins gamma. Mediates the uptake of IgG from milk. Possible role in transfer of immunoglobulin G from mother to fetus. Source: Recombinant protein corresponding to aa24-297 from human IgG receptor FcRn large subunit p51, fused to His-Tag at N-terminal, expressed in mammalian cell. Molecular Weight: ~34.4kD AA