Arrow in d shows the tibial extension. Figure 3 Evidence for the proximalization of skeletal elements in Meis1 -infected limbs.
Roman numerals identify digits.
In all pictures, infected limbs are shown on the right and control limbs on the left. Limbs in c were double-stained for alcian blue and msx1 . Tibia and tibiale condensations are shown in red, fibula and fibulare in yellow and digital arch in green. Figure 4 Alterations in distal nerve and muscle patterning in Meis1 -infected limbs. Muscle and nerve patterns were identified by whole-mount immunohistochemistry in St. 34 limbs.