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In molecular biology, the engrailed homeobox proteins are a family of homeobox proteins which are characterised by the presence of a region of some 20 amino-acid residues located at the C-terminal of the 'homeobox' domain. This region forms a signature pattern for this subfamily of proteins.
References
Scott MP, Tamkun JW, Hartzell GW (July 1989). "The structure and function of the homeodomain". Biochim. Biophys. Acta. 989 (1): 25–48. doi:10.1016/0304-419x(89)90033-4. PMID2568852.