HEADSC 1m77 SEQCRD A C DC CYT 1 1 C C 0 SEQCRD A C DC CYT 2 2 C C 0 SEQCRD A C DC CYT 3 3 C C 0 SEQCRD A G DG GUA 4 4 C C 0 SEQCRD A A DA ADE 5 5 C C 0 SEQCRD A T DT THY 6 6 C C 0 SEQCRD A C DC CYT 7 7 C C 0 SEQCRD A G DG GUA 8 8 C C 0 SEQCRD A G DG GUA 9 9 C C 0 SEQCRD A G DG GUA 10 10 C C 0 PARAME method XRAY PARAME resolution 1.25 PARAME R-factor 0.163 PARAME FreeR-factor 0.185