在植物中合成抗原并口服给予可大大降低疫苗的生产和接种成本。这一技术的运用要求成品中的抗原浓度均一以确保剂量一致。口服时,每剂应含规定数量的抗原。本文报道了产肠毒素性大肠杆菌不耐热肠毒素B亚单位( L t- B)在转基因玉米脱脂胚芽中的分布。　　首先以L t- B植物表达载 Synthetic antigens in plants and oral administration can greatly reduce vaccine production and vaccination costs. The use of this technique requires uniform concentrations of the antigen in the finished product to ensure consistent dosage. Oral, each dose should contain the required number of antigens. This paper reports the distribution of enterotoxigenic Escherichia coli heat-labile enterotoxin B subunit (L t-B) in transgenic maize degreased germ. First Lt-B plant expression vector