Figure 4

A small number of genes are preferentially induced in the prothoracic leg disc. Two comparisons of the prothoracic leg disc (L1) to the wing disc (W) (numbers 83 and 93) are shown. The cluster analysis for these comparisons revealed 23 and 8 induced genes in the L1 (red) and W (green) subclusters, respectively. Note the expression of apterous in the wing disc cluster (see text).