AbdElneam , Ahmed Ibrahim, (1). Department of Clinical Biochemistry, Department of Basic Medical Sciences, College of Medicine, Shaqra University, Dawadmi, Saudi Arabia. (2) Molecular Genetics and Enzymology Department, Human Genetics and genome research institute, National Research Center, 33 El Bohouth St. (former El Tahrir St.), Dokki 12622, Cairo, Egypt., Saudi Arabia