HELIX 1 H VAL A 20 ALA A 26 1 7 HELIX 2 H ALA A 48 ALA A 51 1 4 SHEET 1 A 2 ASN A 2 VAL A 5 0 SHEET 2 A 2 LYS A 8 THR A 11 -1 SHEET 1 B 2 SER A 17 ASN A 19 0 SHEET 2 B 2 THR A 53 LYS A 55 -1 SHEET 1 C 3 GLU A 42 LEU A 44 0 SHEET 2 C 3 VAL A 37 LEU A 39 -1 SHEET 3 C 3 VAL A 60 PHE A 62 -1