[1] Yale Univ, Mol Biophys & Biochem, New Haven, CT USA
[2] Yale Univ, Genet, New Haven, CT USA
[3] Yale Univ, Therapeut Radiol, New Haven, CT USA
[4] Yale Univ, Cellular & Mol Physiol, New Haven, CT USA
[5] RIKEN Ctr Life Sci Technol, Struct Biol, Yokohama, Kanagawa, Japan
[6] Univ Calif Berkeley, Calif Inst Quantitat Biosci, Berkeley, CA 94720 USA