Ready-to-use ELISA kits are available for the detection of cytokine receptor-like factor 1, an alias of the protein, cytokine receptor like factor 1. The official gene symbol is CRLF1. The protein, with a mass of 46.3 kDa and length of 422 residues, is reported to be secreted. It is a member of the Type I cytokine receptor family, Type 3 subfamily and may be known by other names, including: CLF-1, CLF, CISS, cytokine-like factor 1, cytokine type 1 receptor CRLP-1, and class I cytokine receptor, and zcytor5.