Department of Biochemistry and Molecular Biology, Howard University College of Medicine, Washington, District of Columbia, United States of America.|Department of Biochemistry and Molecular Biology, Howard University College of Medicine, Washington, District of Columbia, United States of America.|Department of Biochemistry and Molecular Biology, Howard University College of Medicine, Washington, District of Columbia, United States of America.|Department of Biochemistry and Molecular Biology, Howard University College of Medicine, Washington, District of Columbia, United States of America.|Department of Biochemistry and Molecular Biology, Howard University College of Medicine, Washington, District of Columbia, United States of America.|Department of Biochemistry and Molecular Biology, Howard University College of Medicine, Washington, District of Columbia, United States of America.|Department of Biochemistry and Molecular Biology, Howard University College of Medicine, Washington, District of Columbia, United States of America.