Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1l2wA 1l2wB 1l2wI 2pcrA 2pcrD 1l2wA 100 98 0 15 15 1l2wB 98 100 0 20 22 1l2wI 0 0 100 0 0 2pcrA 8 21 0 100 99 2pcrD 10 20 0 99 100 FOLD SIMILARITY (Z-SCORE) 1l2wA 1l2wB 1l2wI 2pcrA 2pcrD 1l2wA 25.9 21.3 0 0.5 0.5 1l2wB 21.3 25.1 0 0.8 0.7 1l2wI 0 0 5.3 0 0 2pcrA 0.6 0.8 0 47.6 43.9 2pcrD 0.6 0.6 0 43.9 47.7