Enables serotonin binding activity. Involved in several processes, including cellular response to organonitrogen compound; hepatic stellate cell activation; and inositol phosphate metabolic process. Located in several cellular components, including dendrite; neuronal cell body; and plasma membrane. Used to study heart valve disease. Biomarker of congestive heart failure. Orthologous to human HTR2B (5-hydroxytryptamine receptor 2B). [provided by Alliance of Genome Resources, Apr 2022]