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LILRA2, also known as Leukocyte immunoglobulin-like receptor subfamily A member 2, has a 483 amino acid long isoform that is 53 kDa and a short 466 amino acid isoform that is 51 kDa, acts as an activating receptor for eosinophils that elicited the release of cytotoxic granule proteins, de novo lipid mediator generation, and cytokine release through vesicular transport, but does not bind class I MHC antigens. Studies are being performed in relation to this protein and several diseases and disorders including leprosy, microscopic polyangiitis, systemic lupus, erythematosus, lupus erythematosus, hepatitis c, and hepatitis b. This protein has been shown to interact with EWSR1 and USP46 proteins in osteoclast differentiation, defense response, and signal transduction pathways.