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Effects of fiber and penton base mutations in vivo on transduction of skeletal muscle. Luciferase activities were assayed in the gastrocnemius muscle 24 h after direct intramuscular injection of 1010 Pu of vector or buffer alone (mock) and were normalized to the protein content of the samples (relative light units [rlu] per microgram). Each column shows the average from four samples, and the error bars represent the standard deviations.
