Abstract:
:A highly efficient, rapid, and reliable PCR-based method for distinguishing Lactococcus lactis subspecies (L. lactis subsp. lactis and L. lactis subsp. cremoris) is described. Primers complementary to positions in the glutamate decarboxylase gene have been constructed. PCR analysis with extracted DNA or with cells of different L. lactis strains resulted in specific fragments. The length polymorphism of the PCR fragments allowed a clear distinction of the L. lactis subspecies. The amplified fragment length polymorphism with the primers and the restriction fragment length polymorphism of the amplified products agreed perfectly with the identification based on genotypic and phenotypic analyses, respectively. Isolates from cheese starters were investigated by this method, and amplified fragments of genetic variants were found to be approximately 40 bp shorter than the typical L. lactis subsp. cremoris fragments.
journal_name
Appl Environ Microbioljournal_title
Applied and environmental microbiologyauthors
Nomura M,Kobayashi M,Okamoto Tdoi
10.1128/aem.68.5.2209-2213.2002keywords:
subject
Has Abstractpub_date
2002-05-01 00:00:00pages
2209-13issue
5eissn
0099-2240issn
1098-5336journal_volume
68pub_type
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