immune response, humoral immune response, intracellular signaling cascade,
[Isoform 1]: Cell membrane ; Single-pass type I membrane protein . Recruited to lipid rafts when activated. .; [Isoform 2]: Secreted .
Mostly expressed by immune cells of the myeloid lineage, such as monocytes, macrophages, neutrophils and dendritic cells (PubMed:10799849). Expression is associated with a mature stage of myeloid development (PubMed:11922939). Highly expressed in adult liver, lung and spleen than in corresponding fetal tissue. Also expressed in the lymph node, placenta, spinal cord and heart tissues. Isoform 2 was detected in the lung, liver and mature monocytes.