Sequenced BAC clones and the annotated genes drawn to scale. Hox and Evx genes are shown in color, neighboring genes are drawn in black. Abbreviations used are according to , the surrounding genes are identical to those found in Takifugu rubipes. The HoxBa cluster is incomplete, sequence data stops at 12 kb downstream of hoxb5a. Sequence data for the remaining four Hox genes and the non-coding regions of remaining parts of the cluster have been gathered by PCR, indicating that the clustered structure still exists.