IRX4 is a member of the Iroquois homeobox gene family. Members of this family appear to play multiple roles during pattern formation of vertebrate embryos.[4]
^Bruneau BG, Bao ZZ, Tanaka M, Schott JJ, Izumo S, Cepko CL, Seidman JG, Seidman CE (January 2000). "Cardiac expression of the ventricle-specific homeobox gene Irx4 is modulated by Nkx2-5 and dHand". Dev. Biol. 217 (2): 266–77. doi:10.1006/dbio.1999.9548. PMID10625552.
Lewis MT, Ross S, Strickland PA, et al. (1999). "Regulated expression patterns of IRX-2, an Iroquois-class homeobox gene, in the human breast.". Cell Tissue Res. 296 (3): 549–54. doi:10.1007/s004410051316. PMID10370142.
Wang GF, Nikovits W, Bao ZZ, Stockdale FE (2001). "Irx4 forms an inhibitory complex with the vitamin D and retinoic X receptors to regulate cardiac chamber-specific slow MyHC3 expression.". J. Biol. Chem. 276 (31): 28835–41. doi:10.1074/jbc.M103716200. PMID11382777.
Bayrak F, Kömürcü-Bayrak E, Mutlu B, et al. (2008). "Genetic analysis of the Irx4 gene in hypertrophic cardiomyopathy.". Turk Kardiyol Dern Ars. 36 (2): 90–5. PMID18497553.