1. Department of Agriculture and Natural Resources, Santa Rosa Junior College, Santa Rosa, California 95401, United States
2. Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, Texas 78229, United States
3. Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
4. Department of Biological Sciences, St. Mary’s University, San Antonio, Texas 78228, United States
5. Geriatric Research, Education and Clinical Center, Department of Veterans Affairs, South Texas Veterans Health Care System, The University of Texas Health Science Center at San Antonio, San Antonio, Texas 78229, United States