Anti-CYSLTR1 antibodies are used in the immunodetection of the protein cysteinyl leukotriene receptor 1. In humans, the canonical protein has a reported length of 337 amino acid residues and a mass of 38.5 kDa. Its subcellular localization is in the cell membrane. It is found to be widely expressed, with highest levels in spleen and peripheral blood leukocytes. A member of a the G-protein coupled receptor 1 protein family, CYSLTR1 is a known receptor for cysteinyl leukotrienes mediating bronchoconstriction of individuals with and without asthma. Post-translational modifications have been described, including glycosylation. Synonyms for this target antigen include CYSLT1R, CYSLTR, HMTMF81, G-protein coupled receptor HG55, LTD4 receptor, and CYSLT1.