Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2od0A 3rypA 4r8hA 2od0A 100 23 21 3rypA 23 100 99 4r8hA 23 99 100 FOLD SIMILARITY (Z-SCORE) 2od0A 3rypA 4r8hA 2od0A 24.1 0 0 3rypA 0 35 30 4r8hA 0 30 34