1 Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, TX 77550, United States. Electronic address: ssbradri@utmb.edu.
2 Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, TX 77550, United States; Program in Emerging Infectious Diseases, Duke-NUS Graduate Medical School, Singapore 169857, Singapore. Electronic address: maragarc@utmb.edu.