| http://www.w3.org/ns/prov#value | - In one embodiment, calibration of the marker polypeptide is performed by quantifying both the marker polypeptide and a viral protein product itself (e.g., by extracting the tissue making the viral product and measuring the product directly using HPLC, ELISA, radioimmunoassay, Western blot, or other suitable method) over a sufficient time period to permit extrapolation or determination of the stoic
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