HELIX 1 H GLU A 4 VAL A 9 1 6 HELIX 2 H ARG A 25 ASN A 48 1 24 HELIX 3 H PRO A 100 LYS A 105 1 6 HELIX 4 H LYS A 122 ALA A 126 1 5 HELIX 5 H LEU A 134 LEU A 140 1 7 HELIX 6 H LEU A 142 LYS A 156 1 15 SHEET 1 A 4 GLU A 57 SER A 58 0 SHEET 2 A 4 ARG A 64 HIS A 73 -1 SHEET 3 A 4 LEU A 76 ASP A 85 -1 SHEET 4 A 4 GLU A 96 ILE A 97 -1