Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1wvtA 1wvtB 2porA 1wvtA 100 99 15 1wvtB 99 100 15 2porA 15 15 100 FOLD SIMILARITY (Z-SCORE) 1wvtA 1wvtB 2porA 1wvtA 31.1 29.3 0 1wvtB 29.3 31.1 0 2porA 0 0 47