结果表明，培养初期，先以外层少数叶肉细胞开始RNA和蛋白质的合成，接着DNA也开始合成。
The result showed, a few mesophyll cells of outer layer began RNA and protein synthesis at culture initial stage, then, DNA began synthesis.
消化的初期阶段在胃里进行，在这里胃蛋白酶和脂肪酶帮助消化蛋白质和脂肪。
Early stages of digestion take place in the stomach where pepsin and lipase aid in digesting protein and fat.
用SDS-PAGE电泳分析蛋白质的降解规律，同时比较加工初期及末期游离氨基酸的变化，并以不接菌样品为对照。
SDS-PAGE was used to analyze proteolysis of dry-salted duck samples of different processing phases and the free-amino acid(FAA) were tested as well.
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