HEADSC 3ftk SEQCRD A N ASN ASN 1 1 C C 0 SEQCRD A V VAL VAL 2 2 C C 0 SEQCRD A G GLY GLY 3 3 C C 0 SEQCRD A S SER SER 4 4 C C 0 SEQCRD A N ASN ASN 5 5 C C 0 SEQCRD A T THR THR 6 6 C C 0 SEQCRD A Y TYR TYR 7 7 C C 0 PARAME method XRAY PARAME resolution 1.500 PARAME R-factor 0.149 PARAME FreeR-factor 0.158