蛋白表达技术是一组用于在细胞中合成和表达蛋白质的方法，需要根据蛋白质的大小、结构、糖基化需求以及应用的规模选择合适的蛋白表达系统。常见的表达系统可分为原核表达系统（大肠杆菌及其他细菌）、真核表达系统（哺乳动物细胞、昆虫细胞、酵母）等。

Protein expression technology is a set of methods for synthesizing and expressing proteins in cells. It is necessary to select an appropriate protein expression system based on the size, structure, glycosylation requirements of the protein and the scale of the application. Common expression systems can be divided into prokaryotic expression systems (E. coli and other bacteria), eukaryotic expression systems (mammalian cells, insect cells, yeast), etc.