日韩av大片在线观看欧美成人不卡|午夜先锋看片|中国女人18毛片水多|免费xx高潮喷水|国产大片美女av|丰满老熟妇好大bbbbbbbbbbb|人妻上司四区|japanese人妻少妇乱中文|少妇做爰喷水高潮受不了|美女人妻被颜射的视频,亚洲国产精品久久艾草一,俄罗斯6一一11萝裸体自慰,午夜三级理论在线观看无码

Monkey IgG, like other mammalian immunoglobulins G （IgG）, is a Y-shaped glycoprotein composed of two identical heavy chains （γ-chains） and two identical light chains （κ or λ）. Each chain contains constant （C） and variable （V） regions. The variable regions form the antigen-binding fragment （Fab）, responsible for recognizing specific antigens, while the constant region （Fc） mediates immune effector functions such as complement activation and binding to Fc receptors on immune cells. Monkey IgG shares structural similarities with human IgG, particularly in conserved domains like the Fc region, which is critical for cross-species applications.