Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1d3bA 1d3bB 4m7dB 4m7dC 1d3bA 100 15 21 20 1d3bB 15 100 22 36 4m7dB 21 22 100 29 4m7dC 20 36 29 100 FOLD SIMILARITY (Z-SCORE) 1d3bA 1d3bB 4m7dB 4m7dC 1d3bA 18.4 10.9 10.5 11.9 1d3bB 10.9 18.3 9.1 12.5 4m7dB 10.5 9.1 20 9.3 4m7dC 11.9 12.5 9.4 18