ホメオティック遺伝子
231 ncRNAs are present in the four Hox gene cassettes. Similarly to the Hox protein-coding genes, the ncRNAs show differential expression according to the cell's location on the anterior-posterior and proximal-distal axes. These lncRNAs can act either on the set of genes which they are present in, or can act on a separate gene set within the Hox genes.