1. Department of Physiology and PharmacologyTexas A&M University, 4466 TAMU College Station TX 77843‐4466 USA
2. Department of Biomedical Sciences, School of Medicine and Health SciencesUniversity of North Dakota Grand Forks ND 58202‐9037 USA
3. Department of PathobiologyTexas A&M University College Station TX 77843‐4467 USA
4. Protein Chemistry LaboratoryTexas A&M University College Station TX 77843‐2128 USA