Purity ~90% (SDS-PAGE). CD14 is a surface antigen that is preferentially expressed on monocytes/macrophages. It cooperates with other proteins to mediate the innate immune response to bacterial lipopolysaccharide. Alternative splicing results in multiple transcript variants encoding the same protein. Source: Recombinant protein corresponding to aa20-349 from human CD14, fused to His-tag at N-terminus, expressed in E.coli. Molecular Weight: ~37.9kD (353aa), confirmed by MALDI-TOF Applications: Suitable for use in SDS-PAGE.