Amino acids of the Ubx homeodomain have been changed to correspond to Antp residues.
Keilin organ
mesothoracic tracheal pit
metathoracic tracheal pit
ventral denticle belt
Parasegments have a mixed identity, denticle belt phenotype has an Antp-like parasegment 4 identity but the suppression of thoracic segment specific sensory organs has a Ubx-like parasegment 6 identity.