SHEET 1 A 4 VAL A 15 ILE A 20 0 SHEET 2 A 4 PHE A 26 ASN A 31 -1 SHEET 3 A 4 THR A 68 ALA A 73 -1 SHEET 4 A 4 LEU A 86 TRP A 88 1 SHEET 1 B 2 GLN A 37 PRO A 38 0 SHEET 2 B 2 VAL A 62 LEU A 63 -1 SHEET 1 C 4 THR A 51 LYS A 56 0 SHEET 2 C 4 GLU A 43 ILE A 48 -1 SHEET 3 C 4 LYS A 101 LYS A 105 -1 SHEET 4 C 4 GLU A 111 SER A 116 -1