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					Protein-coding gene in the species Homo sapiens
Iroquois-class homeodomain protein IRX-4 , also known as Iroquois homeobox protein 4 , is a protein  that in humans is encoded by the IRX4  gene .[ 5] [ 6] 
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.[ 5] 
^ a b c   GRCh38: Ensembl release 89: ENSG00000113430  – Ensembl , May 2017^ a b c   GRCm38: Ensembl release 89: ENSMUSG00000021604  – Ensembl , May 2017^ "Human PubMed Reference:" . National Center for Biotechnology Information, U.S. National Library of Medicine .^ "Mouse PubMed Reference:" . National Center for Biotechnology Information, U.S. National Library of Medicine .^ a b   "Entrez Gene: iroquois homeobox 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 PMID  10625552 .   
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 . PMID  10370142 . S2CID  37046813 . 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 PMID  11382777 . 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. PMID  18497553 . Cirulli ET, Kasperavičiūtė D, Attix DK, et al. (2010). "Common genetic variation and performance on standardized cognitive tests" . European Journal of Human Genetics . 18  (7): 815– 820. doi :10.1038/ejhg.2010.2 . PMC  2987367 PMID  20125193 . Strausberg RL, Feingold EA, Grouse LH, et al. (2002). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences" . Proc. Natl. Acad. Sci. U.S.A . 99  (26): 16899– 903. Bibcode :2002PNAS...9916899M . doi :10.1073/pnas.242603899 PMC  139241 PMID  12477932 .  
This article incorporates text from the United States National Library of Medicine , which is in the public domain . 
(1) Basic domains 
(1.1) Basic  leucine zipper  (bZIP )(1.2) Basic helix-loop-helix  (bHLH )
Group A Group B Group CPAS  Group D Group E Group F 
(1.3)  bHLH-ZIP (1.4) NF-1 (1.5) RF-X (1.6) Basic helix-span-helix (bHSH) 
(2)  Zinc finger  DNA-binding domains
(2.1)  Nuclear receptor  (Cys4 ) 
subfamily 1 subfamily 2 subfamily 3 subfamily 4 subfamily 5 subfamily 6 subfamily 0 
(2.2) Other Cys4  (2.3) Cys2 His2  (2.4) Cys6  (2.5) Alternating composition (2.6) WRKY 
(4) β-Scaffold factors with minor groove contacts 
 (0) Other transcription factors