Evolutionary relationships and diversification of barhl genes within retinal cell lineages
Basic helix-loop-helix and homeodomain transcription factors have been shown to specify all different neuronal cell subtypes composing the vertebrate retina. The appearance of gene paralogs of such retina-specific transcription factors in lower vertebrates, with differently evolved function and/or c...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
21 November 2011
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| In: |
BMC evolutionary biology
Year: 2011, Volume: 11 |
| ISSN: | 1471-2148 |
| DOI: | 10.1186/1471-2148-11-340 |
| Online Access: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1186/1471-2148-11-340
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| Author Notes: | Laura-Nadine Schuhmacher, Shahad Albadri, Mirana Ramialison and Lucia Poggi |
| Summary: | Basic helix-loop-helix and homeodomain transcription factors have been shown to specify all different neuronal cell subtypes composing the vertebrate retina. The appearance of gene paralogs of such retina-specific transcription factors in lower vertebrates, with differently evolved function and/or conserved non-coding elements, might provide an important source for the generation of neuronal diversity within the vertebrate retinal architecture. In line with this hypothesis, we investigated the evolution of the homeobox Barhl family of transcription factors, barhl1 and barhl2, in the teleost and tetrapod lineages. In tetrapod barhl2, but not barhl1, is expressed in the retina and is important for amacrine cell specification. Zebrafish has three barhl paralogs: barhl1.1, barhl1.2 and barhl2, but their precise spatio-temporal retinal expression, as well as their function is yet unknown. |
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| Item Description: | Gesehen am 10.05.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1471-2148 |
| DOI: | 10.1186/1471-2148-11-340 |