Enables cysteinyl leukotriene receptor activity. Predicted to be involved in several processes, including neuropeptide signaling pathway; positive regulation of ERK1 and ERK2 cascade; and positive regulation of angiogenesis. Predicted to act upstream of or within G protein-coupled receptor signaling pathway. Located in membrane. Human ortholog(s) of this gene implicated in aspirin-induced respiratory disease and asthma. Orthologous to human CYSLTR2 (cysteinyl leukotriene receptor 2). [provided by Alliance of Genome Resources, Apr 2022]