“…The resulting ions are then separated according to their time of flight (TOF), lighter ions being faster than heavier ions, and their m/z is determined based on time used to arrive at the detector [16]. MALDI-TOF-MS is still used today, e.g., for the analysis of immunoprecipitated proteins [17], for protein profiling of food products [18], to identify causative agents of diseases such as bacteria [19], fungi [20], viruses [21,22], or for in situ proteomics in embedded tissues [23].…”