In 1991 he also became Adjunct Professor at the University of California, Irvine (UCI). In 1999 he became Distinguished Carnegie Senior Research Associate in Biology, Emeritus, at Caltech.
In 1991 he also became an adjunct professor at the University of California, Irvine (UCI). In 1999 he became a distinguished Carnegie Senior Research Associate in Biology, Emeritus, at Caltech.