Research Article

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The need for the prospecting for and identification of new biomolecules is a reality. Molecular techniques allow access to the metabolic potential of microorganisms via the isolation of DNA from environmental samples, i.e., without the application of microbial culture techniques. With its great biological diversity, the Atlantic Rainforest biome has a soil rich in organic matter, some ... more

J.H. Amorim; T.N.S. Macena; G.V. Lacerda-Junior; R.P. Rezende; J.C.T. Dias; M. Brendel; J.C.M. Cascardo
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Leptin; obese gene; Polymerase chain reaction; Quantitative trait loci; Restriction fragment length polymorphism

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DNA; Ladder; Polymerase chain reaction; λ DNA

Serving as a DNA molecular weight standard, the DNA ladder has been widely used in molecular biology applications. We developed a simple method for the preparation of a DNA marker, which involves designing primers to amplify 100- to 1000-bp DNA fragments using lambda DNA as a template for polymerase chain reaction, followed by extraction with phenol/chloroform, precipitation with ethanol ... more

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Cathechol-o-methyltransferase; Dopamine D3 receptor; Polymerase chain reaction; Restriction fragment length polymorphism; Schizophrenia; Single nucleotide polymorphism

Molecular components of the dopamine D3 receptor (DRD3) may play an important role in the pathophysiology of schizophrenia. Previous studies have demonstrated an association between DRD3 Ser9Gly and cathechol-o-methyltransferase (COMT, SNP = rs165656) polymorphisms and schizophrenia but the results were inconclusive. We investigated this apparent association between Ser9Gly (A/G) ... more

S.F. Tee; P.Y. Tang; H.C. Loh
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