Can meta-omics help to establish causality between contaminant biotransformations and genes or gene products?

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Johnson, D. R., Helbling, D. E., Men, Y., & Fenner, K. (2015). Can meta-omics help to establish causality between contaminant biotransformations and genes or gene products? Environmental Science: Water Research and Technology, 1(3), 272-278. https://doi.org/10.1039/c5ew00016e