Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1zp3A 1zp3C 3rwaA 3rwtA 1zp3A 100 94 80 27 1zp3C 94 100 33 71 3rwaA 27 33 100 93 3rwtA 27 35 93 100 FOLD SIMILARITY (Z-SCORE) 1zp3A 1zp3C 3rwaA 3rwtA 1zp3A 50.2 43.7 0 0 1zp3C 43.7 48.8 0 0 3rwaA 0 0 43.2 34.4 3rwtA 0 0 34.4 43.2