 Albert Neuberger then recruited her into a new group in London in the biochemical division of the National Institute for Medical Research, and she moved to Mill Hill in 1949.Muir's interests shifted to biology under Neuberger, as he was studying the origin of haem biosynthesis.Muir published her first major papers with Neuberger in the Biochemical Journal in 1949 and 1950 on the biogenesis of porphyrins.