Fig. 1
Comparison of the amino acid sequence of β-lactamase CGB-1 with our strain. Broken lines indicate identical amino acid residues. The vertical arrow indicates the putative cleavage site for the leader peptide of CGB-1. Amino acids that may be involved in the binding of Zinc (Zn2+) or/and water are indicated with a star. Shading corresponds to the single amino-acid mutation occurring in the gene of our strain