The molecular formula amino insight function displays the molecular formula of the entered protein. This is done by accessing the amino insight dataset as a csv file on the flask python backend, searching for the amino acid residue molecular formulae and then adjusting the weight for the -N and -C termini at the ends of the protein. You can learn more about the amino insight dataset here. On this page can search through the dataset and filter columns to quickly access the values and formulae that you need.