IgG1是主要针对细菌及病毒的蛋白质抗原，IgG2主要是抗多糖成分抗体。
B-bod I-bod I-bod I-bod O O O O O B-mic I-mic O B-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic O B-bod I-bod I-bod I-bod O O O B-bod I-bod I-bod I-bod I-bod I-bod I-bod O