Objective To express the nontoxic mutant CRM197 of diphtheria toxin and study its effect as a carrier protein.
目的表达白喉毒素无毒变异体CRM197，并考察其载体作用。
2
Like dysentery, typhus, diphtheria, the epidemic brain keel turns the membrane inflammation and hepatitis B and so on, may have the recovery period cause of disease carrier.
如痢疾、伤寒、白喉、流行性脑脊翻膜炎和乙型肝炎等，都可以有恢复期病原携带者。
3
Like diphtheria, keel position gray matter inflammation and so on, common healthy cause of disease carrier.