The results of RT-PCR experiments using RNA isolated from adult flies (A) or the third instar larvae (B) of <i>D</i>. <i>melanogaster</i> strains transformed with constructs containing different <i>hsp70</i> promoters.

<p>A significant dichotomy in the expression of the I(S-GAGA) construct in adults and larvae is evident, while all other constructs exhibit similar strengths at both stages. *** p ≤ 0.001.