Department of Bioengineering, Rice University, Houston, Texas, United States of America.|Department of Natural Sciences, Del Mar College, Corpus Christi, Texas, United States of America.|Department of Natural Sciences, University of Houston-Downtown, Houston, Texas, United States of America.|Department of Microbiology and Molecular Genetics, University of Texas Medical School, Houston, Texas, United States of America.|Department of Bioengineering, Rice University, Houston, Texas, United States of America.