FIG. 6.

Neighbor-joining tree based on 16S rRNA gene sequences (1,354 bp). Four branches, including the microcystin-producing Anabaena strain isolated from the Gulf of Finland, are boxed. Numbers at the nodes indicate bootstrap values of more than 50% for NJ, MP, and ML analysis. The taxa Nodularia sp. strain PCC73104/1 (accession number AJ133184), Nodularia sp. strain PCC7804 (AJ133181), Cyanospira rippkae (AY038036), Anabaenopsis sp. strain PCC9215 (AY038033), and Anabaena cylindrica (AF091150) were used as outgroups in all analyses. ▪, hepatotoxic strains studied by LC-MS.