LAMP Assay Optimization

MK Mehran Khan
RW Rongbo Wang
BL Benjin Li
PL Peiqing Liu
QW Qiyong Weng
QC Qinghe Chen
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The LAMP assay was optimized using different LAMP primer concentrations [F3/B3 (0.1–0.5 μM) and FIP/BIP (0.8–2.4 μM)], durations (30–70 min), temperatures (57–67°C), and reagents [dNTPs (0.8–2.0 mM), MgSO4 (0.5–3.0 mM), and betaine (1.5–4 M)]. The LAMP system used in this study consisted of 12.5 μL LAMP buffer, 4 μL primer mix (F3/B3 and FIP/BIP), 1 μL calcein-MnCl2, 1 μL template DNA, 1 μL Bst DNA polymerase (8000U, New England Biolabs), and sterile double-distilled water for a final volume of 25 μL. The LAMP reaction was conducted in a thermal water bath by adjustment to the optimized temperature of 63°C for 60 min. The amplified LAMP products were further observed on 2% stained agarose gel with ethidium bromide to confirm amplification. All reactions were repeated at least three times.

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