They are acrylaldehyde hydration , ethylene oxide formylation and biological zymolysis methods 即丙烯醛水合法，环氧乙烷甲酰化法，生物发酵法。
2.
As expected from the reaction mechanism , the carboxyl groups of aspartic and glutamic acid residues were not modified , while the amino groups that could react with the activated peptides were concomitantly protected by formylation 如反应机理所预测的那样，天门冬氨酸和谷氨酸残基未被修饰，而能与活性肽反应的氨基则同时被甲酰化保护起来。
