Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2a2lA 2o1kA 3on3A 3on3B 2a2lA 100 0 58 13 2o1kA 0 100 0 0 3on3A 12 0 100 98 3on3B 13 0 98 100 FOLD SIMILARITY (Z-SCORE) 2a2lA 2o1kA 3on3A 3on3B 2a2lA 31.3 0 0 0 2o1kA 0 6.3 0 0 3on3A 0 0 37.6 32.9 3on3B 0 0 32.9 38.6