Selected HPLC fluorescence detection chromatograms of PSP toxins obtained from Alexandrium minutum strains isolated from the south and west coasts of Ireland. (A and B) Standards of toxins. (C and D) A. minutum Cork Harbor sample (south coast). (E and F) A. minutum Shannon Estuary sample (west coast). Panels A, C, and E and B, D, and F correspond to the first and second isocratic runs, respectively. Only A. minutum strains from the south coast synthesized PSP toxins (GTX2/GTX3).