However, coexisting YTXs and OA changes the toxicological functionality as protein phosphatases 2A (PP2A) inhibits or causing diarrhoea, therefore it hindered YTX to be categorised in the DSP toxin group, although YTX still remains listed as a DSP toxin by accumulating in shellfish predominantly [62,63]. The gene discussed is DSP; the disease is Diarrhea.