Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3fpnA 3fpnB 4ifdD 4ifdI 3fpnA 100 10 0 72 3fpnB 10 100 31 0 4ifdD 0 29 100 80 4ifdI 4 0 29 100 FOLD SIMILARITY (Z-SCORE) 3fpnA 3fpnB 4ifdD 4ifdI 3fpnA 25.4 0 0 0.6 3fpnB 0 23.3 0.1 0 4ifdD 0 0.2 42.8 0 4ifdI 0 0 0 33.3