Professor Alfred Alan Eddy (4 November 1926 – 24 October 2017), usually known as Alan Eddy, was a biochemist who was Professor of Biochemistry at the University of Manchester Institute of Science and Technology (UMIST) between 1959 and 1994.^[1]

Eddy was born on 4 November 1926 in St Just, Cornwall, the son of Alfred and Ellen Eddy.^[1] After completing his secondary education at Devonport High School for Boys, he attended Exeter College, Oxford, graduating with a 1st Class Honours degree in 1949.^[1] He was awarded his DPhil in 1951, supervised by Cyril Hinshelwood.^[2][3][1]

In 1953, Eddy joined the Brewing Industry Research Foundation in Nutfield.^[1] Using snail gastric extracts Eddy, in 1957, was able to prepare protoplasts/sphaeroplasts of the yeast S. pastorianus; the ability to produce cell wall-free yeasts was important in facilitating much of later yeast research.^[4] In 1959, he was appointed to the first chair of Biochemistry at UMIST; he oversaw the creation of the Department of Biochemistry from the previously existing Brewing Chemistry department.^[5] He held this position until his retirement in 1994.^[1] He was Emeritus Professor in the Faculty of Life Sciences at the University of Manchester until his death in 2017.^[6]

Eddy's research interests were diverse, but his major contributions were in the biology of trans-membrane transport, in particular the functioning of proton pumps and symport systems.^[7]

Eddy lived in Disley, Cheshire with his wife Susan Ruth (née Slade-Jones), whom he married in 1954. They had two sons.^[1]

He died on 24 October 2017 at the age of 90.^[8]