Tryptase alpha/beta-1 (TPSAB1)

Tryptase is the major neutral protease present in mast cells and is secreted upon the coupled activation-degranulation response of the cell type. May play a role in innate immunity.

Isoform 2 cleaves large substrates, such as fibronectin, more efficiently than isoform 1, but seems less efficient toward small substrates (PubMed:18854315). .