Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1b3qA 1b3qB 4ppmA 1b3qA 100 99 30 1b3qB 99 100 77 4ppmA 86 77 100 FOLD SIMILARITY (Z-SCORE) 1b3qA 1b3qB 4ppmA 1b3qA 52.6 38.7 0 1b3qB 38.7 52.7 0 4ppmA 0 0 71.8