Proteomics and Mass Spectrometry
While genomics provides the "blueprint" of life, Proteomics studies the actual "machinery"—the proteins. Because proteins undergo post-translational modifications, their function cannot be predicted by DNA alone.
Mass Spectrometry (MS) is the gold-standard tool for proteomic analysis. It works by ionizing chemical species and sorting the ions based on their mass-to-charge ratio. Modern MS systems are now integrated with Liquid Chromatography (LC) to separate complex protein mixtures before they enter the spectrometer. In 2026, "Spatial Proteomics" has emerged as a critical field, using specialized tools to map where specific proteins are located within a tissue sample, providing a 3D view of how tumors interact with the surrounding immune system.