HELIX 1 H GLU A 63 GLY A 73 1 11 HELIX 2 H GLU B 63 GLY B 73 1 11 SHEET 1 A 4 PHE A 9 GLU A 20 0 SHEET 2 A 4 THR A 26 PHE A 34 -1 SHEET 3 A 4 ALA A 39 TRP A 46 -1 SHEET 4 A 4 LYS A 55 THR A 58 -1 SHEET 1 B 4 PHE B 9 GLU B 20 0 SHEET 2 B 4 THR B 26 PHE B 34 -1 SHEET 3 B 4 ALA B 39 TRP B 46 -1 SHEET 4 B 4 LYS B 55 THR B 58 -1