Objective To analyze the effects of codon modification on the expression and immunogenicity of DNA candidate vaccines encoding the Chlamydia trachomatis mouse pneumonitis ( MoPn), major outer membrane protein ( MOMP). 目的探讨密码修饰对沙眼衣原体主要外膜蛋白(MOMP)基因表达和DNA质粒免疫的影响。