1. Department of Biological Sciences, Auburn University, Auburn, Alabama 36849; Email: (CG) guyercr@auburn.edu; (SG) smg029@auburn.edu; (BF) brian.folt@gmail.com; and (MH) mzh0031@tigermail.auburn.edu. Send reprint requests to CG.
2. Department of Cell, Developmental and Integrative Biology, University of Alabama Birmingham, Birmingham, Alabama 35205; Email: kjoyce@uab.edu.