Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2geyA 2iepA 2iepB 2geyA 100 25 28 2iepA 29 100 99 2iepB 30 99 100 FOLD SIMILARITY (Z-SCORE) 2geyA 2iepA 2iepB 2geyA 28 0 0 2iepA 0 27.5 24.5 2iepB 0 24.5 27.3