Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1tljA 1tljB 3s6xA 4u4iA 4u4iB 1tljA 100 99 45 0 40 1tljB 97 100 0 17 16 3s6xA 0 0 100 0 0 4u4iA 41 17 15 100 99 4u4iB 42 16 16 99 100 FOLD SIMILARITY (Z-SCORE) 1tljA 1tljB 3s6xA 4u4iA 4u4iB 1tljA 33.1 17.9 0 0 0 1tljB 28.7 33.4 0 0 0 3s6xA 0 0 30.3 0 0 4u4iA 0 0 0.8 29.6 25.3 4u4iB 0 0 0.8 25.3 28.1