HEADSC 2onw SEQCRD X S SER SER 1 1 C C 0 SEQCRD X S SER SER 2 2 C C 0 SEQCRD X T THR THR 3 3 C C 0 SEQCRD X S SER SER 4 4 C C 0 SEQCRD X A ALA ALA 5 5 C C 0 SEQCRD X A ALA ALA 6 6 C C 0 PARAME method XRAY PARAME resolution 1.510 PARAME R-factor 0.159 PARAME FreeR-factor 0.219