Figure S1 - Origin of Saxitoxin Biosynthetic Genes in Cyanobacteria

Trees of all STX proteins identified in Cylindrospermopsis raciborskii T3 The maximum likelihood bootstrap values are indicated at the nodes in red text. The branch lengths are proportional to the number of substitutions per site (see scale in the figure). The trees have been rooted arbitrarily. STX (+) strains are shown in blue text and the novel ACBU02 and ACFR02 sequences are shown in bold blue text. (1.69 MB PDF)