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• W2143198315 endingPage "406" @default.
• W2143198315 startingPage "396" @default.
• W2143198315 abstract "Abstract Background: Common methods for identification of DNA sequence variants use gel electrophoresis or column separation after PCR. Methods: We developed a method for sequence variant analysis requiring only PCR and amplicon melting analysis. One of the PCR primers was fluorescently labeled. After PCR, the melting transition of the amplicon was monitored by high-resolution melting analysis. Different homozygotes were distinguished by amplicon melting temperature (Tm). Heterozygotes were identified by low-temperature melting of heteroduplexes, which broadened the overall melting transition. In both cases, melting analysis required ∼1 min and no sample processing was needed after PCR. Results: Polymorphisms in the HTR2A (T102C), β-globin [hemoglobin (Hb) S, C, and E], and cystic fibrosis (F508del, F508C, I507del, I506V) genes were analyzed. Heteroduplexes produced by amplification of heterozygous DNA were best detected by rapid cooling (&gt;2 °C/s) of denatured products, followed by rapid heating during melting analysis (0.2–0.4 °C/s). Heterozygotes were distinguished from homozygotes by a broader melting transition, and each heterozygote had a uniquely shaped fluorescent melting curve. All homozygotes tested were distinguished from each other, including Hb AA and Hb SS, which differed in Tm by &lt;0.2 °C. The amplicons varied in length from 44 to 304 bp. In place of one labeled and one unlabeled primer, a generic fluorescent oligonucleotide could be used if a 5′ tail of identical sequence was added to one of the two unlabeled primers. Conclusion: High-resolution melting analysis of PCR products amplified with labeled primers can identify both heterozygous and homozygous sequence variants." @default.
• W2143198315 created "2016-06-24" @default.
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• W2143198315 creator A5051507868 @default.
• W2143198315 creator A5069637303 @default.
• W2143198315 creator A5086093498 @default.
• W2143198315 date "2003-03-01" @default.
• W2143198315 modified "2023-10-03" @default.
• W2143198315 title "Amplicon Melting Analysis with Labeled Primers: A Closed-Tube Method for Differentiating Homozygotes and Heterozygotes" @default.
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• W2143198315 doi "https://doi.org/10.1373/49.3.396" @default.
• W2143198315 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12600951" @default.
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