Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3e39A 5t5iF 5t5iG 3e39A 100 39 30 5t5iF 49 100 18 5t5iG 27 17 100 FOLD SIMILARITY (Z-SCORE) 3e39A 5t5iF 5t5iG 3e39A 32.5 0 0 5t5iF 0 42.7 7.1 5t5iG 0 7.7 20.4