Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2r2vA 2r2vB 4z04A 2r2vA 100 6 9 2r2vB 6 100 8 4z04A 0 0 100 FOLD SIMILARITY (Z-SCORE) 2r2vA 2r2vB 4z04A 2r2vA 5.4 4.6 0 2r2vB 4.3 5.4 0 4z04A 0 0 27.6