Used in immunological research to quantify levels of macrophage colony stimulating factor 1 receptor (CSF1R) in rat samples. Helps in studying macrophage activation, differentiation, and function in various disease models including inflammation, cancer, and autoimmune disorders. Commonly applied in preclinical studies to evaluate immune responses and assess the impact of therapeutic interventions targeting the CSF1/CSF1R pathway. Provides a reliable and sensitive method for detecting soluble or cell-derived CSF1R in serum, plasma, and cell culture supernatants.