Tryptase beta -1 is a serine protease with trypsin-like activity, which is sometimes also referred to as Mast Cell Protease 7 (1). It is stored in the secretory granules of mouse mast cells (2). It exhibits anticoagulant activity due to its ability to degrade fibrinogen in the presence of the diverse array of protease inhibitors in plasma (3). The deduced amino acid sequence for mouse Tryptase beta -1 consists of a signal peptide (residues 1‑18), a pro region (residues 19‑28) and the mature chain (residue 29‑273). The mature chain was expressed and purified.
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