Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2esnA 5uniA 5uniB 2esnA 100 0 26 5uniA 0 100 28 5uniB 27 4 100 FOLD SIMILARITY (Z-SCORE) 2esnA 5uniA 5uniB 2esnA 39.1 0 0 5uniA 0 15.5 6 5uniB 0 3.5 44.3