Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1ci4A 1ci4B 6chgE 6chgF 1ci4A 100 99 0 0 1ci4B 99 100 0 0 6chgE 0 5 100 94 6chgF 0 0 94 100 FOLD SIMILARITY (Z-SCORE) 1ci4A 1ci4B 6chgE 6chgF 1ci4A 23 21.5 0 0 1ci4B 21.5 23 0 0 6chgE 0 0 9 4.4 6chgF 0 0 4.4 8.9