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THE TOTAL OF 324 NOE-DERIVED INTERPROTON DISTANCE RESTRAINTS INCLUDING 33 LONG-RANGE NOE RESTRAINTS AS WELL AS 11 PHI AND 7 CHI1 TORSION ANGLE RESTRAINTS WERE USED FOR STRUCTURE DETERMINATION. BACK CALCULATION OF EXPERIMENTAL NOE SPECTRUM YIELDED THE FINAL R-FACTORS OF RA=0.641 AND RB=0.157. THE FINAL RMSD VALUES ARE 0.90A AND 1.16A FOR THE BACKBONE AND THE HEAVY ATOMS, RESPECTIVELY. RESIDUES 12 - 24 ARE EXTREMELY WELL-DEFINED WITH A BACKBONE RMSD OF 0.56 A WHEREAS THE N-TERMINAL 3 - 11 DISULFIDE LOOP IS FLEXIBLE POSSESSING A BACKBONE RMSD OF 1.09 A.