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Specific activity of omega IFN in bulk form before formulating (“bulk protein”) and after formulating and storage in a DUROS device. Devices were stored at 5, 30, or 40°C. After storage, the protein was extracted from the formulation and its bioactivity was measured. Data bars represent averages, and error bars represent 1 standard deviation of data. N = 1 for measurement of bulk protein, and N = 5–10 at later time points.
