Used in biomedical research to detect and quantify anaplastic lymphoma kinase (ALK) protein levels in cell lysates, tissue extracts, or biological fluids. Widely applied in cancer research, particularly in studies related to ALK-positive non-small cell lung cancer and other ALK-driven tumors. Enables monitoring of ALK expression and phosphorylation status, supporting investigation of signaling pathways and evaluation of targeted therapy efficacy. Suitable for use in preclinical studies and drug development workflows involving ALK inhibitors.