Description: TLR-3 is a single-pass type I receptor that binds to and signals the presence of microbial pathogens and double stranded RNA (dsRNA) viruses. Signaling through TLR-3 can promote the NF-κB pathway to initiate innate and adaptive immune responses to bacterial and viral infections, as well as the p53 pathway to trigger apoptosis in cells infected with dsRNA viruses. TLR-3 belongs to a family of structurally-related toll-like receptors (TLRs) containing an N-terminal domain rich in leucine repeats and a C-terminal intracellular Toll/interleukin (IL)-1 (TIL) domain. TLR-3 is expressed primarily in dendritic cells of the placenta and pancreas where it can reside on both sides of the plasma membrane and in the endosomal compartment of the cells. Recombinant human TLR-3 is 77.4 kDa glycoprotein containing 681 residues which comprise the TLR-3 extracellular domain.

Description: Phagocytosis can be assayed by measuring the engulfment of a cell "substrate". However, traditional assays require tedious cell counting under a microscope. Our CytoSelect 96-Well Phagocytosis Assay, Zymosan Substrate provides a more accurate, user-friendly, high-throughput alternative to the standard phagocytosis assay. The assay may be adapted for use with 24-well or 48-well plates.