Who we are

Pure Transplant Solutions (PTS) is a wholly-owned subsidiary of Pure Protein, L.L.C (Pure Protein). PTS is built on scientific technology developed in the laboratory of Dr. William Hildebrand at Oklahoma University Health Sciences Center. Dr. Hildebrand is an early pioneer in the scientific discipline of HLA sequencing and holds foundational IP in this area.


Founder & Chief Scientist

Founder & Chief Scientist

Dr. William Hildebrand


Dr. Hildebrand founded Pure Transplant Solutions in 2003. He is the Presbyterian Health Foundation Endowed Professor and the Robert Glenn Rapp Foundation Presidential Professor in the Department of Microbiology and Immunology at The University of Oklahoma Health Sciences Center. He has been a CLIA Accredited Clinical HLA Laboratory Director and an American Board for Histocompatibility and Immunogenetics Diplomate (ASHI) since 1998. Dr. Hildebrand has been awarded over $40M in grants from Oklahoma State and Federal government agencies as well as private corporations. He has authored over 120 publications, reviews, and book chapters in peer-reviewed industry works and popular science journals. He was Associate Editor of the Journal of Immunology from 2006-2010. He has served on editorial, advisory, and national review panel boards for the NIH, Center for HIV/AIDS Vaccine Immunology (CHAVI), American Society for Hematology, NIAID and the National Marrow Donor Program. He holds a total of 77 patents in fields related to the discovery and use of the HLA molecule technology he has developed and has appeared on numerous radio and television news programs and in public service announcements highlighting his research.
Vice President

Vice President

Dr. Gina Lento


Dr. Lento serves Pure Transplant Solutions as Vice President of Business Development. She has 10 years in life science commercialization and economic development following a 10-year academic career in biochemistry at three universities in the USA and New Zealand. She specializes in the areas of Business Development, Operations, Clinical Development and Regional Economic Development. Dr. Lento attended Victoria University of Wellington where she received a Bachelor of Science (Honors) in Biochemistry and PhD in Molecular Evolution and Population Genetics. She obtained her degree in Pharmaceutical Science and Drug Evaluation from Melbourne University in Australia.
Director of Research

Director of Research

Dr. Rico Buchli


Dr. Buchli has served as the Director of Research in the PTS lab since 2001. His work is essential to the completion of ongoing research to develop new methodologies and technologies for developing novel soluble HLA proteins for one of the foremost biomedical companies in the country. Dr. Buchli received his PhD in Biochemistry from the University of Basel and served as a Postdoctoral Researcher at UC Davis until 2001 before accepting a Research Assistant Professor position at the University of Oklahoma, Health Science Center. He is the recipient of the Albert M. Kligman Award in Dermatology and The Journal Record’s On the Brink Innovator Award. Dr. Buchli is co-inventor on multiple International and United States patents and authored over publications.
Dr. Curtis McMurtrey

Dr. Curtis McMurtrey


Dr. McMurtrey is currently a postdoctoral fellow in the department of Microbiology and Immunology at the University of Oklahoma and a consultant for Pure Transplant Solutions. Dr. McMurtrey has studied HLA and its role in immunity for 8 years and has current research focused on the role of HLA in immune responses for both infectious disease and transplant rejection. As a consultant for Pure Protein, Dr. McMurtrey is helping to develop next-generation clinical diagnostics as well as novel de-sensitization therapeutics. He is a current member of American Society for Histocomplatibility and Immunogenetics (ASHI) and received 2 of ASHI’s Top Scholar Awards for his work on epitope discovery in West Nile Virus and Mycobacterium tuberculosis (2012) and for his work in for his work in HLA immunity to infectious disease. Dr. McMurtrey earned his PhD from the Microbiology and Immunology Department at the University of Oklahoma.
Mr. Steven Cate

Mr. Steven Cate


Mr. Cate has been studying Human Leukocyte Antigens (HLA) in human organ transplantation for 11 years under Dr. Hildebrand. He supervises the clinical typing of HLA samples for solid organ and bone marrow transplant patients. Mr. Cate wrote three software packages (Phoenix, Intensity Solver, and The Beast) that speed and enhance the identification of viral peptide epitopes embedded in complex MS and MS-2 data. He is an expert in the impact of HLA polymorphisms on viral peptide presentation and is Board certified by the American Society for Histocompatibility and Immunogenetics (ASHI) as a Clinical Histocompatibility Associate (CHA).