Methods for producing modified polypeptides containing amino acid analogues are disclosed. The invention further provides purified dihydrofolate reductase polypeptides, produced by the methods of the invention, in which the methionine residues have been replaced with homoallylglycine, homoproparglycine, norvaline, norleucine, cis-crotylglycine, trans-crotylglycine, 2-aminoheptanoic acid, 2-butynylglycine and allylglycine.
本发明揭示了一种生产含有
氨基酸类似物的改性
多肽的方法。本发明进一步提供了经本发明方法生产的纯化的脱氢叶酸还原酶
多肽,其中甲
硫氨酸残基已被替换为同
丙烯基甘
氨酸,同
丙炔基甘
氨酸,正戊
氨酸,正亮
氨酸,顺-十四烯基甘
氨酸,反-十四烯基甘
氨酸,
2-氨基庚酸,
2-丁炔基甘
氨酸和
丙烯基甘
氨酸。