Earl Reece Stadtman NAS (November 15, 1919 – January 7, 2008)[2] was an American biochemist,[1][3] notable for his research on enzymes[4] and anaerobic bacteria.

Stadtman started his career as a research assistant in the Division of Plant Nutrition of the University of California.

Subsequently he was an Atomic Energy Commission Fellow with Fritz Lipmann in the Massachusetts General Hospital, but after 1960 he worked at the National Heart Institute, where he became chief of the Laboratory of Biochemistry.

From the 1970s onwards Stadtman published many papers with P. Boon Chock on the capacity of cycles of interconvertible enzymes, based especially on his results with glutamine synthetase, to generate very high sensitivity to effectors.

He was (with Bernard Horecker) founding editor of Current Topics in Cellular Regulation, a major series in the subject, and continued in the role up to volume 23 (1984).