Dr. Mohammed A. A. Khalid is on the adjunct faculty in the Department of Chemistry at the College of Applied Medicine and Sciences, University Taif, and he is also an Assistant Professor in the Department of Chemistry, Faculty of Science, University of Khartoum. Dr. Khalid received his B.S. in Chemistry (2000), and his Ph.D. in Physical Chemistry (2007) from Department of Chemistry, Faculty of Science, University of Khartoum. He served as a postdoctoral researcher (2009-2010) at School of Chemistry, Faculty of Science, University of Sydney. Dr. Khalid has done research on P-type ATPase Enzyme Kinetics and Mechanisms; Kinetics and Mechanisms of Redox Reactions; Autocatalytic Reactions; Computational enzyme kinetics; Allosteric acceleration of P-type ATPases by ATP; Dual mechanisms of P-type ATPases by ATP; Exploring of allosteric sites of ATPases; and interaction of ATP with ATPases located in the cell membranes; and has published many papers in these research areas.