HELIX 1 H PRO A 528 LYS A 535 1 8 HELIX 2 H LYS A 573 LEU A 588 1 16 HELIX 3 H PRO B 528 ASN B 533 1 6 HELIX 4 H LYS B 573 LEU B 588 1 16 SHEET 1 A 3 TYR A 541 THR A 547 0 SHEET 2 A 3 ARG A 554 VAL A 561 -1 SHEET 3 A 3 GLN A 564 GLY A 570 -1 SHEET 1 A 3 TYR B 541 THR B 547 0 SHEET 2 A 3 ARG B 554 VAL B 561 -1 SHEET 3 A 3 GLN B 564 GLY B 570 -1