Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1q5yA 1q5yC 1q5yD 2zyjA 1q5yA 100 99 96 0 1q5yC 99 100 97 0 1q5yD 96 97 100 4 2zyjA 0 0 0 100 FOLD SIMILARITY (Z-SCORE) 1q5yA 1q5yC 1q5yD 2zyjA 1q5yA 20.2 18 16.9 0 1q5yC 18 20.1 16.7 0 1q5yD 16.9 16.7 19.7 0.4 2zyjA 0 0 0 72.1