HEADSC 2lr9 SEQCRD A F PHE PHE 1 1 C C 0 SEQCRD A N ASN ASN 2 2 H H 0 SEQCRD A W TRP TRP 3 3 H H 0 SEQCRD A R ARG ARG 4 4 H H 0 SEQCRD A C CYS CYS 5 5 H H 0 SEQCRD A C CYS CYS 6 6 H H 0 SEQCRD A L LEU LEU 7 7 H H 0 SEQCRD A I ILE ILE 8 8 H H 0 SEQCRD A P PRO PRO 9 9 H H 0 SEQCRD A A ALA ALA 10 10 H H 0 SEQCRD A C CYS CYS 11 11 H H 0 SEQCRD A R ARG ARG 12 12 H H 0 SEQCRD A R ARG ARG 13 13 H H 0 SEQCRD A N ASN ASN 14 14 C C 0 SEQCRD A H HIS HIS 15 15 C C 0 SEQCRD A K LYS LYS 16 16 C C 0 SEQCRD A K LYS LYS 17 17 C C 0 SEQCRD A F PHE PHE 18 18 C C 0 SEQCRD A C CYS CYS 19 19 C C 0 SEQCRD A X NH2 CYS 20 19 C C 0 PARAME method NMR PARAME resolution NA PARAME R-factor NA PARAME FreeR-factor NA