Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3t6oA 3t6oC 4bwdA 4bwdB 3t6oA 100 98 0 0 3t6oC 98 100 0 0 4bwdA 0 10 100 5 4bwdB 4 0 5 100 FOLD SIMILARITY (Z-SCORE) 3t6oA 3t6oC 4bwdA 4bwdB 3t6oA 27.8 24.9 0 0 3t6oC 24.9 27.7 0 0 4bwdA 0 0 7.4 6.2 4bwdB 0 0 6.2 7.5