FIG. 3.

Multiple alignment of McyA amino acid sequences of cultured isolates of Microcystis aeruginosa LE-3 (translated from the mcyA gene sequence under accession no. DQ379709), Microcystis aeruginosa PCC7806 (accession no. AAF00960), Planktothrix aghardii NIVA-CYA34 (CAD56463), Anabaena flos-aquae NIVA-CYA83 (CAD56455), and Nostoc sp. strain 152 (CAD56464) with novel Microcystis-like McyA sequences from natural samples that contain two extra amino acids, unlike Microcystis sequences from cultured isolates.