Sun et al. MS# F-00084-2002.R1 1 Molecular Cloning, Expression and Function of Osteoclastic Calcineurin Aα. Inhibition of Bone Resorption by TAT-Calcineurin Aα Li Sun, Baljit S. Moonga, Min Lu, Neeha Zaidi, Jameel Iqbal, Harry C. Blair 1 , Solomon Epstein, Etsuko Abe, Bruce R. Troen, Christopher L.-H. Huang 2 , and Mone Zaidi Mount Sinai Bone Program and Division of Endocrinology, Mount Sinai School of Medicine, New York, NY and Endocrine Division and The Geriatric Research Education and Clinical Center (GRECC), Veterans Affairs Medical Center, Bronx, NY; 1 Department of Pathology, University of Pittsburgh, PA, USA; 2 The Physiological Laboratory, University of Cambridge, UK. Key Words calcineurin, Ca 2+ channel, gene cloning, osteoclast, bone resorption Short Title Calcineurin Aα regulates bone resorption Correspondence to: Li Sun, MD, PhD. Division of Endocrinology, Box 1055, Mount Sinai School of Medicine, One Gustave Levy Place, New York NY 10029 Tel: 212-241-8797, fax: 212-426-8312 E-mail: li.sun@mssm.edu