Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2chcA 2chcB 2chcC 4g2kA 4g2kC 2chcA 100 96 95 0 0 2chcB 96 100 99 0 0 2chcC 95 99 100 0 0 4g2kA 45 52 43 100 99 4g2kC 34 42 43 99 100 FOLD SIMILARITY (Z-SCORE) 2chcA 2chcB 2chcC 4g2kA 4g2kC 2chcA 33.3 30.7 30.6 0 0 2chcB 30.7 33.2 30.8 0 0 2chcC 30.6 30.8 33.1 0 0 4g2kA 0 0 0 12.8 11.1 4g2kC 0 0.2 0 11.1 12.5