Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1hdfB 5w4aA 5w4aC 1hdfB 100 24 32 5w4aA 3 100 99 5w4aC 12 99 100 FOLD SIMILARITY (Z-SCORE) 1hdfB 5w4aA 5w4aC 1hdfB 26.1 0 0 5w4aA 0 40.6 37.7 5w4aC 0 37.7 41