realizes has_specified_input inheres in function mass spectrometer assay mass spectrometry assay An assay that identifies the amount and type of material entities present in a sample by fragmenting the sample and measuring the mass-to-charge ratio of the resulting particles. Identification of a proteins cut out from a 2D gel by cleaving it into peptides using trypsin digestion using electrospray ionizatino to ensure the peptides are charged, and accelerating them with an electro magnetic field in which the flight path is determined by the mass / charge ratio of the peptides. Comparing the mass/charge ratio of peptides in the proteins with databases of protein sequences allows to identify which protein gave rise to the peptides. Philippe Rocca-Serra Philippe Rocca-Serra mass spectrometry assay metadata complete