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

CD304, also known as neuropilin-1 （NRP-1） or BDCA-4, is a type I transmembrane protein that plays crucial roles in various biological processes. It is a non-tyrosine kinase C-type lectin receptor, first identified on the cell membrane of plasmacytoid dendritic cells （pDCs）. CD304 is involved in neuronal guidance during embryogenesis, angiogenesis, and immune responses. It serves as a co-receptor for vascular endothelial growth factor （VEGF） and members of the semaphorin family, interacting with plexins and VEGF receptors on neurons and endothelial cells. In the immune system, CD304 is expressed on natural Treg cells and may contribute to immunosuppression and tumor growth regulation. Additionally, CD304 is a valuable marker for distinguishing residual disease in B-cell acute lymphoblastic leukemia （B-ALL） and is widely used in minimal residual disease （MRD） detection.