Fig. 4. Northern blot of two clones injected with c1-GFP in comparison with non-injected control clones. Overnight exposition of the film allowed the detection of the c1-GFP-mRNA at
1.4 kb whereas the endogenous mRNA of c1 (
0.6 kb) is undetectable in transformed and control clones, even after 120 hours of exposure (not shown).