Abstract
Amelogenins are hydrophobic, proline-rich proteins that are the primary biosynthetic products of ameloblasts. These cells are responsible for the formation of tooth enamel, and amelogenins play an important role in the process of biomineralization. A cDNA, corresponding to the mouse 26-kDa amelogenin, has been molecularly cloned and sequenced. Southern blot analysis of genomic DNA from the mouse using this cDNA as a probe indicates that there is only one mouse amelogenin ( Amel) gene. This paper describes restriction site variation for the Amel gene that we have identified between C57BL 6 and M. spretus and the segregation of that variation as an X-chromosome gene. The position of the amelogenin locus ( Amel) relative to the loci for α-galactosidase ( Ags), proteolipoprotein ( Plp), and the random genomic probe DXWas31 has been determined. Amel is established as: (1) the most distal locus in the genetic map of the mouse X chromosome, (2) lying proximal to the X:Y pairing region, and (3) being restricted to the mouse X chromosome.
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