Stelzer was born and brought up in Frankfurt-am-Main, DE in 1959. Between 1977 and 1982, he was a student of Physics at the Johann-Wolfgang-Goethe-Universität in Frankfurt, before obtaining his Diploma (German Diplom) in 1983 from the Max-Planck-Institut für Biophysik, also in Frankfurt. Stelzer then joined EMBL as a PhD student in Physical Instrumentation and his PhD was awarded by Ruprecht-Karls-Universität, in Heidelberg, DE. His thesis was entitled "Zur Bedeutung des konfokal arrangierten Rasterlichtmikroskops in der Molekularbiologie." Between 1986 and 1987, Stelzer was a postdoctoral fellow in Physical Instrumentation, before becoming a Project Leader in 1987 and then a Group Leader in 1989.
In 2009, Stelzer took up a position of Principal Investigator at Goethe University in Frankfurt. He left EMBL in 2011 to take up a post of Professor in the Life Sciences, again at Goethe-Universität.
The Suck Group, led by Dietrich Suck, was active from 1982 until Suck's retirement in 2009. It formed part of the Structural and Computational Biology Unit at EMBL Heidelberg.
Williamson was born in Camberwell, London (GB) on 12 January 1948, and grew up in Bermondsey, London. His family later moved to Dartford, Kent, where he completed his education in 1966. He spent the majority of his career working for the British government before joining EMBL in 2001, from which he retired in December 2015.
As a parting gift to EMBL, he offered EMBL a large statue of the letter G, located at EMBL in Heidelberg. Alongside the initials of the Advanced Training Centre (ATC), the G represents guanine when A, T and C stand for adenine, thymine and cytosine respectively, forming the four nucleobases of DNA.