Description: This 10-1-PIR monoclonal antibody reacts with mouse paired Ig-like receptors of activating (PIR)-A and -B. These cell surface glycoproteins, which contain six extracellular Ig-like domains with distinct transmembrane and cytoplasmic regions, are expressed together on B lymphocytes, dendritic cells, macrophages, granulocytes, platelets, and mast cells. However, expression of PIR-A/B has not been observed on T cells, NK cells, and erythrocytes. The PIR-A receptor interacts with signaling molecules containing immunoreceptor tyrosine-based activation motifs (ITAMs) which lead to its activating function. In contrast, the PIR-B receptor associates with proteins possessing immunoreceptor tyrosine-based inhibitory motifs (ITIMs); therefore, this receptor has been shown to have an inhibitory function. PIRs bind MHC class I to modulate cell signaling and homeostasis of the immune system. Moreover, PIR-B knockout mice have been shown to exhibit susceptibility to Salmonella infection.

Crossblocking studies indicate that 10-1-PIR recognizes a different epitope from 6C1 (cat. no. 46-5978).