trypsin

in proteomics
https://doi.org/10.1351/goldbook.09787

Serine protease with highly specific primary endoproteolytic activity that serves to generate proteolytic peptides in bottom-up proteomics analysis.

Note: It may be modified by reductive methylation or glycosylation to increase its thermal stability.
Source:
PAC, 2018, 90, 1121. (Terminology of bioanalytical methods (IUPAC Recommendations 2018)) on page 1165 [Terms] [Paper]