HELIX 1 H GLU A 13 HIS A 23 1 11 HELIX 2 H ARG A 36 GLU A 40 1 5 HELIX 3 H GLY A 47 ARG A 63 1 17 HELIX 4 H GLN A 71 MET A 82 1 12 SHEET 1 A 2 ASN A 28 LEU A 29 0 SHEET 2 A 2 HIS A 68 VAL A 69 1