Purity ~90% (SDS-PAGE). Coats the epithelia of the intestines, airways, and other mucus membrane-containing organs. Thought to provide a protective, lubricating barrier against particles and infectious agents at mucosal surfaces. Major constituent of both the inner and outer mucus layers of the colon and may play a role in excluding bacteria from the inner mucus layer. Source: Recombinant protein corresponding to aa36-240 from human MUC2, fused to His-SUMO-Tag at N-terminal expressed in E. coli. Molecular Weight: ~38.8kD AA