Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2nqtA 2nqtB 4r3nA 5d55A 5d55B 2nqtA 100 99 82 26 66 2nqtB 99 100 82 11 67 4r3nA 82 100 100 43 61 5d55A 61 61 41 100 98 5d55B 67 67 58 98 100 FOLD SIMILARITY (Z-SCORE) 2nqtA 2nqtB 4r3nA 5d55A 5d55B 2nqtA 64.8 61.6 30.1 0 0 2nqtB 61.6 64.5 30.4 0 0 4r3nA 30.2 12.2 64.3 0 0 5d55A 0 0 0 26.5 19.9 5d55B 0 0 0 19.9 26.6