InvivoGen provides an extensive set of tools to study the innate immune system, including a comprehensive collection of pathogen-associated molecular patterns (PAMPs). PAMPS are recognized by pattern recognition receptors (PRRs). Five families of PRRs have been shown to initiate pro-inflammatory signaling pathways: Toll-like receptors (TLRs), NOD-like receptors (NLRs), RIG-I-like receptors (RLRs), C-type lectin receptors (CLRs) and cytosolic dsDNA sensors (CDSs). Also, some NLRs are involved in the formation of pro-inflammatory complexes called inflammasomes. We also provide labeled ligands to activate or study these receptors, and we offer diverse NF-κB and NFAT activators.