Description_x000D_ General description_x000D_ The mouse monoclonal antibody 4B4-1 recognizes a conformational epitope on CD137, an approximately 40 kDa type I transmembrane protein of the TNFR family expressed mainly on activated T cells._x000D_ Immunogen_x000D_ Recombinant human CD137 ectodomain_x000D_ Physical form_x000D_ Solution in phosphate buffered saline with 15 mM sodium azide._x000D_ Disclaimer_x000D_ Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.