Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1zzgA 2hr3A 2hr3B 1zzgA 100 0 0 2hr3A 48 100 99 2hr3B 45 99 100 FOLD SIMILARITY (Z-SCORE) 1zzgA 2hr3A 2hr3B 1zzgA 70.8 0 0 2hr3A 0 23.5 20.1 2hr3B 0 20.1 23.1