Used in immunological research to quantitatively measure rat CD4 molecule levels in biological samples such as serum, plasma, or cell culture supernatants. This ELISA kit is particularly useful in studies related to T-cell activation, immune response modulation, and autoimmune diseases in rat models. It supports research in transplantation, infectious diseases, and neuroinflammation by enabling accurate assessment of CD4+ T cell activity. The assay helps evaluate immune system changes under experimental treatments, making it a valuable tool in preclinical studies and pharmaceutical development.