The Jak1 (6G4) Rabbit mAb (BSA and Azide Free) Antibody from Cell Signaling Technology is a Rabbit Monoclonal antibody to JAK1, and Janus kinase 1. This antibody recognizes Homo Sapiens, Human, Mouse, and Rat antigen. The Jak1 (6G4) Rabbit mAb (BSA and Azide Free) Antibody has been shown to work in the following applications: Immunohistochemistry, Immunohistochemistry - fixed, and Western Blot.