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Journal Article

Isolation and expression of the homeobox gene Gbx1 during mouse development.

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Rhinn,  Muriel
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Werner,  Michaela
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Brand,  Michael
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Citation

Rhinn, M., Lun, K., Werner, M., Simeone, A., & Brand, M. (2004). Isolation and expression of the homeobox gene Gbx1 during mouse development. Developmental Dynamics, 229(2), 334-339.


Cite as: https://hdl.handle.net/21.11116/0000-0001-1245-D
Abstract
In zebrafish, gbx1 and otx2 are among the earliest genes expressed in the neuroectoderm, dividing it into an anterior and a posterior domain with a common border that marks the midbrain-hindbrain boundary (MHB) primordium. Here, we describe the sequence and expression pattern of Gbx1 in mouse. The first transcripts are found at embryonic day 7.75 in the hindbrain. Later on, expression of Gbx1 is detectable in the hindbrain (rhombomeres 2 to 7), spinal cord, optic vesicles, and in the ventral telencephalon. In mouse, Gbx1 expression is not observed at the MHB as is the case during early zebrafish development. We suggest that an evolutionary switch occurred: in mouse Gbx2 is involved in the early specification of the MHB primordium, whereas in zebrafish, gbx1 is required instead of gbx2.