[Identification of mutation in PAX9 gene in a Mongolian family with non-syndromic oligodontia].

Objective: To investigate the mutation in transcription factor paired box gene PAX9 in a mongolian family with non-syndromic oligodontia.

Methods: Peripheral blood was collected from 17 core family members (9 unaffected, 8 affected) in this Mongolian family with non-syndromic oligodontia. Mutation in exons of PAX9 gene was identified by PCR amplification and DNA sequencing.

[Expression of feedback-resistant aspartate kinase gene in Corynebacterium crenatum].

The AEC-resistant aspartate kinase gene from C. crenatum CD945 was cloned into vector pJC1. Its expression was investigated both in the wild type C.