It is with sincerely mixed emotions that we bid farewell to Dr. Michael Lukey, who has accepted a position at Cold Spring Harbor. Dr. Lukey first joined the lab in 2011, and made his mark through a number of important studies pertaining to the glutaminase enzymes. Michael was known in the laboratory as much for his rigorous and detailed approach to science as for his late-night experimental sessions. Michael discovered that glutaminase enzymes were regulated by the transcription factor c-Jun, and went on to help show that liver glutaminase, which was generally thought to be an anti-cancer factor, was actually pro-oncogenic in receptor positive breast cancers. Michael was tremendously productive during these studies and others, and we wish him the very best of luck in his new position.