Tryptophan over-producing cell suspensions of Catharanthus roseus (L) G. Don and their up-scaling in stirred tank bioreactor: detection of a phenolic compound with antioxidant potential. - Verma, Priyanka; Mathur, Ajay; Masood, Nusrat; Luqman, Suaib; Shanker, Karuna (Protoplasma, 2013)