Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3suiA 3suiB 4troA 3suiA 100 0 0 3suiB 0 0 0 4troA 0 0 0 FOLD SIMILARITY (Z-SCORE) 3suiA 3suiB 4troA 3suiA 27.9 0 0 3suiB 0 0 0 4troA 0 0 0