HEADSC 2ol9 SEQCRD A S SER SER 1 1 C C 0 SEQCRD A N ASN ASN 2 2 C C 0 SEQCRD A Q GLN GLN 3 3 C C 0 SEQCRD A N ASN ASN 4 4 C C 0 SEQCRD A N ASN ASN 5 5 C C 0 SEQCRD A F PHE PHE 6 6 C C 0 PARAME method XRAY PARAME resolution 0.850 PARAME R-factor 0.073 PARAME FreeR-factor 0.078