Tag Archives: PCR Contamination

Real-Time PCR Troubleshooting: Late Ct Values, No Amplification & Contamination

Real-time PCR troubleshooting featuring amplification curves, a PCR instrument, and common issues including late Ct values and contamination.

Every laboratory running real-time PCR eventually encounters unexpected results: a flat amplification curve, Ct values that shift later than expected, or amplification in a no-template control (NTC). These problems can originate from sample quality, extraction, reagents, assay setup, or instrument settings. Identifying the cause requires a systematic approach rather than changing multiple variables at once. […]