Purity >90%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie? Blue Staining. MW (observed): 25-35 kDa, reducing conditions. MW (theoretical): 24.9 kDa. The Recombinant Mouse IL-27 p28/IL-30 Protein from R&D Systems is derived from NS0. The Recombinant Mouse IL-27 p28/IL-30 Protein has been validated for the following applications: Bioactivity.