HEADSC 2n6m SEQCRD A G GLY GLY 1 1 C C 0 SEQCRD A I ILE ILE 2 2 C C 0 SEQCRD A F PHE PHE 3 3 C C 0 SEQCRD A S SER SER 4 4 H H 0 SEQCRD A K LYS LYS 5 5 H H 0 SEQCRD A L LEU LEU 6 6 H H 0 SEQCRD A A ALA ALA 7 7 H H 0 SEQCRD A G GLY GLY 8 8 H H 0 SEQCRD A K LYS LYS 9 9 H H 0 SEQCRD A K LYS LYS 10 10 H H 0 SEQCRD A I ILE ILE 11 11 H H 0 SEQCRD A K LYS LYS 12 12 H H 0 SEQCRD A N ASN ASN 13 13 H H 0 SEQCRD A L LEU LEU 14 14 H H 0 SEQCRD A L LEU LEU 15 15 H H 0 SEQCRD A I ILE ILE 16 16 H H 0 SEQCRD A S SER SER 17 17 H H 0 SEQCRD A G GLY GLY 18 18 H H 0 SEQCRD A L LEU LEU 19 19 H H 0 SEQCRD A K LYS LYS 20 20 H H 0 SEQCRD A G GLY GLY 21 21 C C 0 PARAME method NMR PARAME resolution NA PARAME R-factor NA PARAME FreeR-factor NA