Betty Mack Twarog (August 28, 1927 – February 6, 2013) was an American biochemist who was the first to find serotonin in mammalian brain.
at Tufts College she heard a lecture on mollusc muscle neurology and in 1949 enrolled under John Welsh in the PhD program at Harvard to study this area.
[3] In autumn 1952 Twarog moved for family reasons to the Kent State University area, and chose the Cleveland Clinic as a place to continue her study of her hypothesis that invertebrate neurotransmitters would also be found in mammals.
[4][5] Twarog left the Cleveland Clinic in 1954 and continued to work on invertebrate smooth muscle at Tufts, Harvard and SUNY at Stony Brook.
[2] In later years, at the Bigelow Laboratory for Ocean Sciences in Boothbay Harbor, Maine, she worked on how shellfish evade phytoplankton poisons.