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    Biochem Int. 1992 Sep;27(6):1051-7.

    Molecular analysis of genetic mutation in electrophoretic variant of human lactate dehydrogenase-A(M) subunit.

    Sudo K, Maekawa M, Shioya M, Ikeda K, Takahashi N, Isogai Y, Li SS, Kanno T, Machida K, Toriumi J.

    Department of Laboratory Medicine, Jikei University School of Medicine, Daisan Hospital, Komae, Japan.

    An electrophoretic variant of lactate dehydrogenase-A (M) subunit was discovered in a patient with multiple myeloma. DNA analysis of the variant allele revealed a nucleotide substitution (transition) of C to T at codon 314 (CGT-TGT), and this mutation resulted in the replacement of an arginine by a cysteine (R314C). This amino acid replacement affects the net charge of the subunit and makes the LDH-A variant have a faster electrophoretic mobility. The responsible missense mutation created a new restriction site, AGGCCT, which can be simply detected by endonuclease AatI digestion. In addition, four synonymous substitutions with no amino-acid replacements were found at codons 51, 119, 163 and 175 in the LDH-A gene from the patient.

    PMID: 1445373 [PubMed - indexed for MEDLINE]

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