Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 4cpcE 4cpcG 5udqA 4cpcE 100 56 21 4cpcG 56 100 41 5udqA 0 0 100 FOLD SIMILARITY (Z-SCORE) 4cpcE 4cpcG 5udqA 4cpcE 9.3 7.9 0 4cpcG 7.9 9.5 0 5udqA 0 0 40.3