HEADSC 2n1s SEQCRD A A ALA ALA 1 1 C C 0 SEQCRD A A ALA ALA 2 2 C C 0 SEQCRD A G GLY GLY 3 3 C C 0 SEQCRD A Q GLN GLN 4 4 C C 0 SEQCRD A C CYS CYS 5 5 C C 0 SEQCRD A Y TYR TYR 6 6 C C 0 SEQCRD A R ARG ARG 7 7 C C 0 SEQCRD A G GLY GLY 8 8 C C 0 SEQCRD A R ARG ARG 9 9 C C 0 SEQCRD A C CYS CYS 10 10 C C 0 SEQCRD A S SER SER 11 11 C C 0 SEQCRD A G GLY GLY 12 12 C C 0 SEQCRD A G GLY GLY 13 13 C C 0 SEQCRD A L LEU LEU 14 14 C C 0 SEQCRD A C CYS CYS 15 15 E E 0 SEQCRD A C CYS CYS 16 16 E E 0 SEQCRD A S SER SER 17 17 C C 0 SEQCRD A K LYS LYS 18 18 C C 0 SEQCRD A Y TYR TYR 19 19 C C 0 SEQCRD A G GLY GLY 20 20 C C 0 SEQCRD A Y TYR TYR 21 21 C C 0 SEQCRD A C CYS CYS 22 22 E E 0 SEQCRD A G GLY GLY 23 23 E E 0 SEQCRD A S SER SER 24 24 C C 0 SEQCRD A G GLY GLY 25 25 H H 0 SEQCRD A P PRO PRO 26 26 H H 0 SEQCRD A A ALA ALA 27 27 H H 0 SEQCRD A Y TYR TYR 28 28 H H 0 SEQCRD A C CYS CYS 29 29 H H 0 SEQCRD A G GLY GLY 30 30 H H 0 PARAME method NMR PARAME resolution NA PARAME R-factor NA PARAME FreeR-factor NA