Figure 2

(A) The gene clusters encoding the AlgE epimerases in A. vinelandii and in A. chroococcum. The modular structures of each protein are depicted beneath the corresponding genes. (B) Alignment of the A modules of A. vinelandii AlgE2 and AlgE7 and A. chroococcum AcAlgE1, AcAlgE2, and AcAlgE3. All proteins are compared to ConA, a consensus sequence derived from the nine A-modules contained in A. vinelandii AlgE1-AlgE7. The active site residues are underlined in the ConA sequence. The conserved Tyr235 and Tyr307 are marked with brackets.