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Like a play director, the Hox genes do not act in the play or participate in limb formation themselves. The protein product of each Hox gene is a transcription factor. Each Hox gene contains a well-conserved DNA sequence known as the homeobox, of which the term "Hox" was originally a contraction. However, in current usage the term Hox is no ...
Hox genes are found in bilateral animals, including Drosophila (in which they were first discovered) and humans. Hox genes are a subset of the homeobox genes. The Hox genes are often conserved across species, so some of the Hox genes of Drosophila are homologous to those in humans. In general, Hox genes play a role of regulating expression of ...
These genes are grouped similarly to the Hox complex found in insects. The mouse has four complexes, HoxA, HoxB, HoxC, and HoxD, each on different chromosomes. Individual genes in each complex correspond to specific members of the Drosophila genome. The mammalian Hox genes can function in Drosophila as partial replacements for the Drosophila ...
The main interest in this set of genes stems from their unique behavior and arrangement in the genome. Hox genes are typically found in an organized cluster. The linear order of Hox genes within a cluster is directly correlated to the order in which they are expressed in both time and space during development. This phenomenon is called colinearity.
This gene is part of the A cluster on chromosome 7 and encodes a DNA-binding transcription factor which may regulate gene expression, morphogenesis, and cellular differentiation. The homeobox protein Hox-A1 may be involved in the placement of hindbrain segments in the proper location along the anterior-posterior axis during development. [8]
Homeobox protein Hox-D13 is a protein that in humans is encoded by the HOXD13 gene. [ 5 ] [ 6 ] [ 7 ] This gene belongs to the homeobox family of genes. The homeobox genes encode a highly conserved family of transcription factors that play an important role in morphogenesis in all multicellular organisms.
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Homeobox protein Hox-D1 is a protein that in humans is encoded by the HOXD1 gene. [5] [6] [7] This gene is a member of the Antp homeobox family and encodes a protein with a homeobox DNA-binding domain. This nuclear protein functions as a sequence-specific transcription factor that is involved in differentiation and limb development.