亚洲精品综合日韩中文字幕网站_精品综合久久久久97_中文在线天堂网www_久久精品免费一区二区三区_91久久国产综合精品女同国语_久久资源总站在线国产成人

The intact antibody of human immunoglobulin （IgG） is composed of the fragment for antigen binding （Fab） and the crystallizable fragment （Fc） for binding of Fcγ receptors. Among the four subclasses of human IgG （IgG1, IgG2, IgG3, IgG4）, which differ in their constant regions, particularly in their hinges and CH2 domains, IgG1 has the highest FcγR-binding affinity, followed by IgG3, IgG2, and IgG4.