Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1xl3A 1xl3C 4ogqA 4ogqD 1xl3A 100 35 100 0 1xl3C 31 100 41 0 4ogqA 51 32 100 0 4ogqD 0 0 0 100 FOLD SIMILARITY (Z-SCORE) 1xl3A 1xl3C 4ogqA 4ogqD 1xl3A 32.9 4.7 2.3 0 1xl3C 4.8 20.2 2.3 0 4ogqA 0 2 32.2 0 4ogqD 0 0 0 28.1