Used in immunological research to quantify levels of RANTES/CCL5 in biological samples such as serum, plasma, and cell culture supernatants. Helps in studying inflammatory responses, immune cell recruitment, and disease mechanisms including autoimmune disorders, viral infections like HIV, and allergic conditions. Commonly applied in preclinical studies to evaluate therapeutic interventions targeting chemokine pathways. Provides a reliable, sensitive, and specific measurement for monitoring changes in RANTES expression under experimental or clinical conditions.