Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2dreA 2dreB 2dxqA 2dxqB 2dreA 100 99 0 30 2dreB 99 100 48 25 2dxqA 33 52 100 99 2dxqB 35 28 99 100 FOLD SIMILARITY (Z-SCORE) 2dreA 2dreB 2dxqA 2dxqB 2dreA 37.3 31.4 0 0 2dreB 31.4 37.7 0 0 2dxqA 0 0 29.2 25 2dxqB 0 0 25 28.7