Algharrawi, K.H.R. and Subramanian, M. 2020. Production of 7-methylxanthine from Theobromine by Metabolically Engineered E. coli. Iraqi Journal of Chemical and Petroleum Engineering. 21, 3 (Sep. 2020), 19–27. DOI:https://doi.org/10.31699/IJCPE.2020.3.3.