Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1iq6A 1iq6B 1ni5A 3cuqA 1iq6A 100 99 51 47 1iq6B 99 100 57 54 1ni5A 33 0 100 22 3cuqA 41 50 100 100 FOLD SIMILARITY (Z-SCORE) 1iq6A 1iq6B 1ni5A 3cuqA 1iq6A 26.9 24.3 0 0 1iq6B 24.3 26.8 0 0 1ni5A 0 0.8 53.5 0 3cuqA 0 0 2.2 34.3