Recombinant Dermatophagoides farinae Mite group 2 allergen Der f 2 (DERF2) is a purified Recombinant Protein. Purity: >90% as determined by SDS-PAGE. Host: E. coli. Endotoxin Level: Not Tested. Species: Dermatophagoides farinae (American house dust mite). Target Name: Mite group 2 allergen Der f 2 (DERF2) . Accession Number: Q00855, DERF2. Expression Region: 18-146aa. Tag Info: N-terminal 6xHis-SUMO-tagged. Theoretical MW: 30.1kda. Target Synonyms: Allergen Der f II Allergen: Der f 2 Restrictions: For Research Use Only. Not for use in diagnostic procedures.