Discrimination of Methionine Sulfoxide and Sulfone by Human Neutrophil Elastase oleh Darren Leahy, Cameron Grant, Alex Jackson, Alex Duff, Nicholas Tardiota, Jessica Van Haeften, Xingchen Chen, Jonathan M. Peake, Michael D. Kruppa, Eliot T. Smith, David A. Johnson, William B. Lott, Jonathan M. Harris