Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2p90A 2p90B 4wvaA 2p90A 100 99 91 2p90B 99 100 85 4wvaA 83 80 100 FOLD SIMILARITY (Z-SCORE) 2p90A 2p90B 4wvaA 2p90A 45.9 42.1 0 2p90B 42.1 45.9 0 4wvaA 0 0 76.9