Human MUC5B Recombinant Protein (N-His) is a recombinant protein expressed in E. coli, spanning Ser5657-Ala5756(Cys5681Ala, Cys5705Ala), with an N-terminal His tag. Predicted molecular weight: 13.19 kDa. Purity: >90% as determined by SDS-PAGE. Supplied lyophilized from a solution in PBS pH 7.4, 1 mM EDTA, 4% Trehalose, 1% Mannitol. Applications: ELISA, immunogen, SDS-PAGE and Western blot. Mucin-5B is a ~596 kDa protein. Gel-forming mucin that is thought to contribute to the lubricating and viscoelastic properties of whole saliva and cervical mucus. For research use only.