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Expression of genes related to saxitoxin (STX) transport (sxtM and sxtPer) in Aphanizomenon gracile UAM529 under three different temperatures. Data represent relative expression of genes sxtM (A) and sxtPer (B) respective to 23 °C, which was set to 1 and placed on the left-hand side of each bar group to facilitate comparison. Letters indicate groups with significant differences (p < 0.05; one-way ANOVA and Holm-Sidak post hoc test).
