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主题:NASA发现由砷构成的新生命,推翻现有生物学理论 -- 尖石

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家园 质谱是否更敏感,更确切?

”We then used high-resolution secondary ion mass spectrometry (NanoSIMS) to positively identify As in extracted, gel purified genomic DNA.

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These measurements therefore specifically demonstrated that the purified DNA extracted from +As/-P cells contained As. Our NanoSIMS analyses, combined with the evidence for intracellular arsenic by ICP-MS and our radiolabeled 73AsO4 experiments demonstrated that intracellular AsO4(3-) was incorporated into key biomolecules, specifically DNA.“

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