Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 4z04A 5munA 5munB 4z04A 100 38 34 5munA 36 100 99 5munB 26 99 100 FOLD SIMILARITY (Z-SCORE) 4z04A 5munA 5munB 4z04A 27.6 0 0 5munA 0 31.6 28.8 5munB 0 28.8 32.2