Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1ni5A 4u12A 4yusA 1ni5A 100 0 52 4u12A 24 100 16 4yusA 71 9 100 FOLD SIMILARITY (Z-SCORE) 1ni5A 4u12A 4yusA 1ni5A 53.5 1.5 0 4u12A 0.4 15.3 1.5 4yusA 0 1.6 51.1