Non-Uniform Depletion Across Targeted Sequences (RNA Depletion for RNA-seq)

Question

Accepted Answer

Depletion efficiency varies significantly across different targeted sequences. Some target regions show good depletion while others remain at high levels. Common causes: 1) Probe amount not optimized for specific sample composition and target abundance 2) Relative probe concentration insufficient for high-abundance target regions 3) Probe pool ratio not adjusted for differential target expression levels 4) Sample-specific factors (secondary structure, accessibility) affect probe binding differently across targets Solutions: 1) Titrate total amount of probe pool used to optimize for your specific sample type 2) Increase relative probe amount for specific targeted regions showing poor depletion 3) Adjust probe pool composition by spiking in additional probes for under-depleted regions 4) Perform pilot experiments with varying probe:target ratios to identify optimal conditions 5) Consider target RNA secondary structure and redesign probes for problematic regions