There are a number of ELISA Kits available for the measurement of interferon, lambda receptor 1, another term for the human protein, interferon lambda receptor 1. Other synonyms may include: CRF2-12, IFN-lambda receptor 1, IFN-lambda-R1, IL-28 receptor subunit alpha, IL-28RA, class II cytokine receptor CRF2/12, and cytokine receptor class-II member 12. It is encoded by the IFNLR1 gene to yield a protein 520 amino acids in length and 57.7 kDa in size. However, there are up to 4 reported isoforms. The protein is categorized into the Type II cytokine receptor family. Versions of interferon, lambda receptor 1 are present in other organisms, including: Mouse, Rat, Frog.