Figure 1
From: How Hox genes can shed light on the place of echinoderms among the deuterostomes
General organization of a complete Hox cluster with the two additional genes Mox and Evx (uppermost row). The Hox genes are grouped into three classes (Hox3 has been included in the anterior class). Also indicated are expression of the spatial (middle row) and temporal (bottom row) colinearities.