Tag Archives: Molecular Testing

FFPE Samples for NGS: Challenges, Quality Control & Best Practices

FFPE tissue block and histology slides with DNA sequencing graphics illustrating NGS sample preparation and quality control.

Formalin-fixed, paraffin-embedded (FFPE) tissue is widely used in cancer research and molecular oncology. Pathology archives provide valuable specimens for studying genetic alterations, but preparing these samples for next-generation sequencing (NGS) presents unique challenges. The same formalin fixation process that preserves tissue morphology can also fragment and chemically modify DNA and RNA. These changes may affect […]

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. […]

Nucleic Acid Extraction for PCR and NGS: Methods, Quality Control, and Best Practices

Nucleic acid extraction for PCR and NGS showing a laboratory pipette, sample tube, and automated purification equipment.

When a real-time PCR run produces unexpectedly high Ct values or an NGS library fails quality control, the problem may start before amplification or sequencing—with nucleic acid extraction. DNA and RNA extraction is a critical step in molecular workflows. Poor recovery, contamination, or inhibitor carryover can affect downstream results, even when assays and instruments perform […]

NGS vs. Real-Time PCR: Which Molecular Method Fits Your Lab?

NGS vs. real-time PCR comparison for molecular laboratory workflows

Real-time PCR and next-generation sequencing answer different molecular questions. Compare target coverage, throughput, workflow complexity, data analysis and other considerations when choosing an approach for your laboratory.

Respiratory Season 2026–27: Planning Your Multiplex RT-PCR Workflow

Multiplex RT-PCR respiratory testing workflow for the 2026-27 respiratory season

The 2026–27 respiratory season is beginning. See how multiplex RT-PCR panels, extraction workflows and thoughtful target selection can help molecular laboratories prepare for changing respiratory research demands.