James Riordan was a close colleague of Bert Vallee for more than 40 years working with him in the field of metallobiochemistry. Riordan arrived in Bert’s lab as a postdoctoral fellow in 1961 and worked closely with him until his retirement in 2005. They published numerous papers together and collaborated extensively. 

James F Riordan, PhD Professor of Biochemistry, Emeritus, Harvard Medical School