Used to measure JAK2 enzyme activity in human biological samples such as blood, serum, or cell lysates. Commonly applied in research settings to study signaling pathways involved in immune responses, inflammation, and hematological disorders. Helps in the development and monitoring of targeted therapies for diseases like myeloproliferative neoplasms, where JAK2 mutations play a key role. Enables high-throughput screening of potential drug candidates that modulate JAK2 activity. Supports clinical research by providing a reliable method to assess JAK2 activation levels in patient samples.