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Abstract
An enolase-encoding cDNA clone from Chinese cabbage, Brassica campestris ssp. Pekinensis, was isolated. This gene (Accession number: AY307448) had a total length of 1580 bp with an open reading frame of 1335 bp, and encoded a predicted polypeptide of 444 amino acids with a molecular weight of 47.38 kDa. The deduced amino acid (aa) sequence shared identity with a number of enolases ranging from Bacillus subtilis to human beings and had much higher identity with other plant enolases than with enolases from Bacillus, yeast and human beings. Comparison of its primary structure with those of other enolases revealed the presence of an insertion of 5 amino acids in enolase of Chinese cabbage. Expression of the cloned enolase gene decreased under salt stress, but increased in response to low temperature. Southern blot analysis of genomic DNA indicated that low-copies of enolase gene were present in the genome of Chinese cabbage.