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Biochem Biophys Res Commun. 1994 Aug 30;203(1):219-24.

Molecular cloning of human class IV alcohol dehydrogenase cDNA.

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  • 1Alcohol Research Center, Bronx VA Medical Center, New York, NY.


A cDNA encoding a new type of alcohol dehydrogenase was cloned from a human stomach cDNA library. PCR amplification of 5'-stretch human stomach lambda gt11 library, using degenerate inosine-containing oligonucleotide probes compatible with peptide sequences of human sigma-ADH, resulted in a single product. Subsequently, internal non-degenerate primers were constructed according to the sequences occurring in the product. By PCR with combinations of these new primers and lambda gt11 forward and reverse primers, fragments of the cDNA containing its 5' and 3' ends were amplified. The full length cDNA sequence has 1125 nucleotides with a 72% similarity to those of human class I ADH. The polypeptide sequence, predicted from the cDNA, corresponds to 373 amino acids with a high degree of similarity (96%) to fragments of sigma-ADH previously reported. Northern hybridization analysis with the specific probe for the mRNA of this protein showed that it is expressed in the human stomach but not in the liver. These data indicate that the cDNA we cloned is that of human class IV ADH.

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