Two Americans, James Rothman and Randy Schekman, and Germany’s Thomas Suedhof were awarded the 2013 Nobel Prize for Medicine on Monday. They were honored for their research into how cells organize their transport system. The Nobel committee said the research helped determine how insulin is manufactured and released into the blood. Rothman is a professor at Yale University, Schekman is a professor at the University of California, Berkeley, and Suedhof is a professor at Stanford. Medicine is the first of the Nobel prizes to be awarded, with physics to be announced Tuesday, chemistry Wednesday, literature Thursday, and peace Friday.