menu icon in the top, right corner of the screen.
icon above to close this box.
icon at the bottom of the screen below the browser—if you don't see it, swipe up to unhide it.
John M. Butler is a leading expert on DNA typing and a fellow at the National Institute of Standards and Technology. Butler received his bachelor's degree from Brigham Young University and his PhD from the University of Virginia.
- 190 views
John M. Butler
John M. Butler
