HELIX 1 H VAL A 19 SER A 31 1 13 HELIX 2 H GLY A 41 PHE A 48 1 8 HELIX 3 H GLN A 55 ALA A 65 1 11 HELIX 4 H GLN A 75 LEU A 89 1 15 SHEET 1 B 2 ILE A 39 THR A 40 0 SHEET 2 B 2 ARG A 72 A 73 -1