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Portimine is a recently discovered member of a class of marine micro-algal toxins called cyclic imines. In dramatic contrast to related compounds in this toxin class, portimine has very low acute toxicity to mice but is highly cytotoxic to cultured cells. In this study we show that portimine kills human Jurkat T-lymphoma cells and mouse embryonic fibroblasts (MEFs), with LC50 values of 6 and 2.5 nM...
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