小中大'就是变性完了冻结,然后抽取早期融化的液体'
Because the urea would have lower solubility at 0 C than in RT, this principle behind this, is likely the same as the 'rapid dilution' or 'step-wise dilution'.
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都是降低变性盐的浓度,不过自觉冷析出更“安定”一些……