We investigated the differences in the expression levels of Dio2
and Dio3 mRNA among tissues from different nitrate doses and
control larvae. Images of ethidium bromide-stained gels were captured
by Gel DocTM XR+ with Image LabTM software (BIO-RAD).
For each tissue, the levels of Dio2 and Dio3 mRNA were normalized
against the a-actin mRNA levels. The standard curve was used to
check the specificity of PCR products. All samples were analyzed
in triplicate and the mean value of these triplicate measurements
were used for the calculations of the mRNA levels.