Used in immunological research to quantify CCL28 levels in biological samples such as serum, plasma, or cell culture supernatants. Enables study of mucosal immunity, particularly in the context of inflammatory diseases, allergic responses, and host-pathogen interactions. Commonly applied in research on asthma, inflammatory bowel disease, and cancer immunology to understand chemokine-mediated recruitment of immune cells. Supports development and evaluation of therapeutic agents targeting chemokine pathways.