Used in immunological research to quantify CD200 protein levels in biological samples such as serum, plasma, and cell culture supernatants. Helps study immune regulation, particularly in contexts like autoimmune diseases, transplantation, cancer, and neuroinflammation. The kit enables detection of interactions between CD200 and its receptor (CD200R), which play a role in suppressing immune responses. Widely applied in preclinical studies to evaluate immune checkpoint pathways and assess therapeutic targets. Provides a reliable, sensitive, and high-throughput method for monitoring CD200 expression in mouse models.