Fig. 2. The expression of other Six family members is not affected by
Hoxa2. Semi-quantitative RT-PCR on RNA extracted from E10.5 second
branchial arches of wild-type (+/+) and Hoxa2-/- (-/-)
embryos using specific primers for Six1, Six2, Six4, Six5 and
GADPH. The results shown were observed in three independent
experiments.