HELIX 1 H PRO A 8 GLU A 19 1 12 HELIX 2 H HIS A 28 ASP A 44 1 17 HELIX 3 H ASN A 49 ARG A 68 1 20 HELIX 4 H VAL B 7 GLU B 19 1 13 HELIX 5 H HIS B 28 ASP B 44 1 17 HELIX 6 H ASN B 49 GLU B 70 1 22