研究北京鸭腔上囊发育过程中B细胞系内肌动蛋白聚合状态的变化。结果表明,26d龄胚和出生后3周龄的腔上囊B细胞中,肌动蛋白主要以聚合型存在。而出生后12周龄退化期的腔上囊中B细胞内,肌动蛋白则以单体型为主要的存在形式。推测腔上囊B细胞肌动蛋白的聚合程度,可能是与腔上囊B细胞功能状态相关的重要因素之一。 To study the changes of actin polymerization state in B cell line during the development of duck bursa in Beijing. The results showed that actin was predominantly aggregated in 26 d-old embryos and 3-week-old suprachoroidal B-cells. However, in the 12-week-old degenerating period of the supracavitary sac cells, actin takes the haplotype as the predominant form. The speculation of the degree of polymerization of B cell actin in the suprachoroidal space may be one of the important factors related to the functional status of B cell in supracavitary space.