Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1euhA 4oqpA 1euhA 100 89 4oqpA 90 100 FOLD SIMILARITY (Z-SCORE) 1euhA 4oqpA 1euhA 67.6 0.6 4oqpA 0.6 49.6