Abstract
The mouse is a very useful system for the analysis of vertebral column development, particularly as a model for human skeletal diseases. A large number of mutant mouse strains exist with specific inherited skeletal defects. Undulated (un) is one of these mutants showing abnormalities of the vertebral bodies and intervertebral discs. The gene responsible for un has been identified as the Pax-1 gene, a member of the Pax-gene family. A human disease homologue to un is not known so far. In order to facilitate identification of a potential human PAX-1 disease, an overview is given describing what is currently known about the pathological and molecular analysis of un. It is hoped that this will help medical geneticists and dysmorphologists to identify a potential human disease, which corresponds to a mutation in the PAX-1 gene.
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