Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2scpA 3zinA 3zinB 2scpA 100 43 0 3zinA 48 100 0 3zinB 0 0 0 FOLD SIMILARITY (Z-SCORE) 2scpA 3zinA 3zinB 2scpA 36.5 0 0 3zinA 0.2 60.7 0 3zinB 0 0 0