Purity >80% by SDS-PAGE and Coomassie blue staining. MW (theoretical): 26 kDa. The Mindin/Spondin-2 Recombinant Protein Antigen from Novus Biologicals is derived from E. coli. The Mindin/Spondin-2 Recombinant Protein Antigen has been validated for the following applications: Antibody Competition.