SHEET 1 A 3 MET A 11 LEU A 13 0 SHEET 2 A 3 VAL A 3 THR A 6 -1 SHEET 3 A 3 VAL A 44 GLN A 46 -1 SHEET 1 C 3 GLU A 19 ASP A 21 0 SHEET 2 C 3 LEU A 26 HIS A 30 -1 SHEET 3 C 3 ALA A 36 ASN A 40 -1