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Development, Vol 112, Issue 3 807-811, Copyright © 1991 by Company of Biologists
JOURNAL ARTICLES |
K Schughart, CJ Bieberich, R Eid and FH Ruddle
Institut fur Immunbiologie, Freiburg, Germany.
To characterize cis-acting regulatory elements of the murine homeobox gene, Hox-2.2, transgenic mouse lines were generated that contained the LacZ reporter gene under the control of different fragments from the presumptive Hox-2.2 promoter. A promoter region of 3600 base pairs (bp) was identified, which reproducibly directed reporter gene expression into specific regions of developing mouse embryos. At 8.5 days postcoitum (p.c.) reporter gene activity was detected in posterior regions of the lateral mesoderm and, in subsequent developmental stages, expression of the LacZ gene was restricted to specific regions of the developing limb buds and the mesenchyme of the ventrolateral body region. This pattern of Hox-2.2-LacZ expression was found in all transgenic embryos that have been generated with the 3.6 kb promoter fragment (two founder embryos and embryos from five transgenic lines). In addition, embryos from two transgenic mouse lines expressed the reporter gene at low levels in the developing central nervous system (CNS). Our results are consistent with the idea that in addition to their presumptive role in CNS and vertebrae development, Hox-2.2 gene products are involved in controlling pattern formation in developing limbs.
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