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Never freeze a mixed solution, and discard it if it ever looks cloudy or discoloured
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
Wada-Ama U.S
Draw the correct units: Pull back the syringe plunger to 4 units (Phase 1) or 8 units (Phase 2)
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