Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2qjfA 4uc3A 2qjfA 100 0 4uc3A 49 100 FOLD SIMILARITY (Z-SCORE) 2qjfA 4uc3A 2qjfA 68.5 0 4uc3A 0 29.6