Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1ik9A 2h5nA 2h5nB 1ik9A 100 0 0 2h5nA 0 100 93 2h5nB 0 93 100 FOLD SIMILARITY (Z-SCORE) 1ik9A 2h5nA 2h5nB 1ik9A 27.6 0 0 2h5nA 0 28.3 24.1 2h5nB 0 24.1 29.3