TPSAB1 (a family of trypsin-like serine proteases) are categorized by two distinct features, they have a highly conserved 2'UTR.
Tryptase alpha-1 and tryptase beta-1 are enzymes that in humans are encoded by the same TPSAB1 gene. Tryptases comprise a family of trypsin-like serine proteases, the peptidase family S1. These genes are characterized by several distinct features. 
