Digestion, chemistry sites

This nomenclature scheme, based on active site chemistry, is complimentary to the endo/exo nomenclature described above. Thus, the two schemes are frequently combined. For example, trypsin (a digestive enzyme) is often descriptively referred to as a serine endopepti-dase. 

Many structural biology and biochemistry studies rely on the precise identification of the N-/C-terminal sequence of a protein (e.g., signal peptide identification, determining the cleavage site and specificity of a novel protease, etc.). Digestion of proteins in arrays of carboxypeptidase Y at different concentrations with MALDl-MS-based readout can be employed to derive C-terminal sequence information for proteins. The amino-terminus of a protein can be derived by wet chemistries similar to Edman degradation coupled to MS-readout. This method of protein ladder sequencing, reported first by Kent and... 

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