Used in research and diagnostic applications to detect osteopontin, a protein involved in inflammation, bone remodeling, and cancer progression. Enables precise quantification and localization of osteopontin in biological samples such as serum, tissue sections, and cell lysates. Commonly applied in ELISA, Western blotting, immunohistochemistry, and flow cytometry to study diseases including osteoporosis, rheumatoid arthritis, cardiovascular conditions, and various cancers. Supports development and validation of therapeutic agents targeting osteopontin pathways.