A shortage of one common nutrient could help cancer cells and viruses hide from the immune system. Researchers at Rockefeller University found that a shortage of arginine, an amino acid obtained from food and produced by the body, can interrupt the cellular machinery needed to make MHC-I proteins. These proteins act as a surveillance system, [...]

A new prototype takes mass spectrometry from analyzing a few molecules at a time to handling billions at once. Mass spectrometry is already a cornerstone technology for identifying what molecules are present in a sample and how much of each is there. However, most current instruments still examine molecules one at a time or in [...]