Quantification of LucR and LucF+ activities in mouse muscle 5 and 55 days after electrotransfer. LucR and LucF+ activities were measured at days 5 and 55 with a luminometer. A. Bioluminescent signal quantification. LucR and LucF+ are expressed in RLU/μg total protein. Each value corresponds to one muscle. B. Mean of IRES activities. It was determined as the ratio of LucF+/LucR multiplied by 100 (± sem, n = 6). Statistical anaysis, p = 0.0022 for EMCV, p = 1 for FGF1A and p = 0,0931 for FGF2.