抗体与抗原结合的直接效应-中和作用 中和病毒 Acidification of endosome Viruses bind to receptor Receptor-mediated Antibody blocks binding after endocytosis triggers to virus receptor and can on cell surface endocytosis of virus fusion of virus with cell and also block fusion event entry of viral DNA 章 病毒与受体结合 病毒内吞 病毒与细胞融合， 抗体阻断病毒与细 病毒DNA进入细胞 胞融合Viruses bind to receptor on cell surface Receptor-mediated endocytosis of virus Acidification of endosome after endocytosis triggers fusion of virus with cell and entry of viral DNA Antibody blocks binding to virus receptor and can also block fusion event 病毒与受体结合 病毒内吞 病毒与细胞融合， 病毒DNA进入细胞 抗体阻断病毒与细 胞融合 抗体与抗原结合的直接效应-中和作用 中和病毒