Description_x000D_ General description_x000D_ Fc region of human immunoglobulin G1 (IgG1) protein, also known as Il-4, GenBank Accession No. P01857, a.a. 100-330, expressed in an HEK293 cell expression system. MW = 27 kDa._x000D_ Human secreted interleukin 17 A (IL-17A) also known as, IL-17 and cytotoxic T lymphocyte antigen 8 (CTLA8) GenBank Accession No. NM_ 002190, a.a 20-155(end), expressed in an e. coli expression system. This protein exists naturally as a homodimer; M.W. = 17.5 kDa (monomer); 35 kDa dimer_x000D_ Physical form_x000D_ Aqueous solution