Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2v4iA 2v4iB 4nocA 4nocB 2v4iA 100 21 11 52 2v4iB 40 100 37 28 4nocA 0 56 100 98 4nocB 0 37 96 100 FOLD SIMILARITY (Z-SCORE) 2v4iA 2v4iB 4nocA 4nocB 2v4iA 35.9 2.4 0 0 2v4iB 0 35.7 0 0 4nocA 0 0 27.1 21.3 4nocB 0 0 21.3 26.8