Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2gs4A 2gs4B 3h36A 2gs4A 100 99 6 2gs4B 99 100 6 3h36A 22 20 100 FOLD SIMILARITY (Z-SCORE) 2gs4A 2gs4B 3h36A 2gs4A 31.9 28 1.9 2gs4B 28 31.5 2.4 3h36A 2.5 2.4 18.2