Leading Biology's Mast Cell Tryptase (TPSB2) Rabbit pAb (APR22474N) is a Rabbit Polyclonal antibody. This antibody has been shown to work in applications such as: Western Blot. The Mast Cell Tryptase (TPSB2) Rabbit pAb (APR22474N) Antibody was generated using TPSB2, and Tryptase Beta 2 as the antigen and it reacts with Human, and Rat.