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When the complex does ionize intact, the copper isotope pattern is a decisive confirmation: the two stable isotopes occur at roughly sixty-nine and thirty-one percent natural abundance, giving a distinctive doublet two mass units apart at approximately a two-to-one intensity ratio that is nothing like the isotope envelope of a small peptide
When water freezes, it forms ice crystals that push solutes (including the benzyl alcohol) out of the ice lattice
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