HEADSC 2n30 SEQCRD A X ACE ACE 1 1 C C 0 SEQCRD A F PHE PHE 2 2 C C 0 SEQCRD A E GLU GLU 3 3 C C 0 SEQCRD A D ASP ASP 4 4 C C 0 SEQCRD A L LEU LEU 5 5 C C 0 SEQCRD A P PRO PRO 6 6 H H 0 SEQCRD A N ASN ASN 7 7 H H 0 SEQCRD A F PHE PHE 8 8 H H 0 SEQCRD A G GLY GLY 9 9 H H 0 SEQCRD A H HIS HIS 10 10 H H 0 SEQCRD A I ILE ILE 11 11 H H 0 SEQCRD A Q GLN GLN 12 12 H H 0 SEQCRD A V VAL VAL 13 13 H H 0 SEQCRD A K LYS LYS 14 14 H H 0 SEQCRD A V VAL VAL 15 15 H H 0 SEQCRD A F PHE PHE 16 16 H H 0 SEQCRD A N ASN ASN 17 17 H H 0 SEQCRD A H HIS HIS 18 18 H H 0 SEQCRD A G GLY GLY 19 19 H H 0 SEQCRD A E GLU GLU 20 20 H H 0 SEQCRD A H HIS HIS 21 21 H H 0 SEQCRD A I ILE ILE 22 22 C C 0 SEQCRD A H HIS HIS 23 23 C C 0 SEQCRD A H HIS HIS 24 24 C C 0 SEQCRD A X NH2 NH2 25 25 C C 0 PARAME method NMR PARAME resolution NA PARAME R-factor NA PARAME FreeR-factor NA