Provided below are ELISA kits targeting cytokine receptor like factor 2, a human protein encoded by CRLF2. This protein is 371 amino acids long, with a mass of 42 kDa, and is a member of the Type I cytokine receptor family, Type 5 subfamily. 3 isoforms have been identified. This is reported to be a membrane and secreted protein. Glycosylation sites have been reported. Other alias names for this protein include: IL-XR, TSLP receptor, cytokine receptor CRL2 precusor, thymic stromal lymphopoietin protein receptor, CRL2, CRLF2Y, and TSLPR.