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. 2018 Jan 9;9:108. doi: 10.1038/s41467-017-02575-0

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© The Author(s) 2017

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Fig. 2 — Photo-CIDNP effects on nucleotides. The H8 proton (black arrow) of guanosine mononucleotide (GMP) experiences a strong absorptive signal enhancement upon irradiation in the presence of flavin mononucleotide (FMN). Top: dark spectra. Middle: irradiated spectra. Bottom: CIDNP spectra, shown as the difference (light minus dark). The concentrations were 20 mM GMP and 0.5 mM FMN