Oligo Design Guides for PCR, Tm, CRISPR and Pool QC
Choose the next guide for a real oligo design task: PCR primer design, Tm method choice, CRISPR sgRNA library planning, oligo pool QC, gene assembly, or synthesis prep before ordering.
Start With the Design Task
Design & Validate PCR Primers
Choose primer length, check Tm and GC, screen dimers, and troubleshoot failed PCR before ordering.
Plan Oligo Pool Synthesis
Move from pool design and synthesis method choice to vendor selection, QC expectations, and order readiness.
Why Do Tm Calculators Disagree?
See why NEB, IDT, and Primer3 can report different values, how salt and Mg2+ shift Tm, and which assumptions to use for PCR or qPCR.
Design & QC a CRISPR sgRNA Library
Choose the right library format, rank sgRNAs, size coverage, define oligo architecture, and review QC before screening.
Focused Method Decisions
Which Tm Calculation Method to Use?
Decision tree for choosing between SantaLucia NN, Owczarzy salt correction, Wallace rule, and %GC methods.
Choose PCR Annealing Temperature from Primer Tm
Translate primer Tm values into a Q5, Phusion, Taq, or generic PCR annealing-temperature starting point.
Resolving Tm Discrepancies Between Tools
Why different tools report different Tm values and how to reconcile discrepancies.
Primer Dimer Check Decisions
Interpret primer dimer ΔG, 3′ end risk, and redesign decisions after running a structure prediction.
Primer Hairpin Check Decisions
Interpret primer hairpin ΔG, stem location, loop risk, and redesign decisions after running a structure prediction.
GC Content Calculation Formula
Calculate GC percentage by hand, handle ambiguous bases, and decide when to open the GC Content Analyzer.
Diagnose PCR Failure from Hairpins & Primer Dimers
Use gel clues, ΔG thresholds, and tool checks to decide whether hairpins, self-dimers, or cross-dimers are blocking amplification.
What QC Should I Request for Oligos?
Decide what vendor QC to request, how to read QC reports, and how to review oligo pool quality before and after synthesis.
Oligo Pool Error Rates & Coverage
Understanding synthesis error rates, dropout rates, and how to calculate required sequencing depth.
Design Illumina Adapters & Dual Indexes
Choose adapter structure, set up UDI, prevent index hopping, and QC custom Illumina-compatible adapters before ordering.
Primer3 Thermodynamic Penalty Scoring
How Primer3 evaluates primer quality using thermodynamic penalty scores, and how to interpret the results.
Method References
Understanding GC Content
What GC content means for your oligos, why it matters for synthesis and PCR, and how to interpret GC distribution.
IntermediateDNA Secondary Structures Explained
Hairpins, self-dimers, G-quadruplexes, and i-motifs. How they form, why they matter, and how to predict them.
IntermediateOligonucleotide Synthesis Methods
Column-based vs array-based synthesis. Phosphoramidite chemistry explained. How synthesis method affects quality.
Oligo Pool Guides
Move from pool architecture to synthesis choice, vendor short-listing, QC checks, and application-specific execution.
Solutions by Audience
For Academic Labs
Browser-based calculators and guides for teaching, method checks, and bench planning.
For Biotech Companies
Sequence checks for target discovery, assay development, and oligo pool preparation.
For Pharma R&D
Private browser-side calculations and reproducible parameter records for study documentation.
Tool Comparisons
Compare oligo analysis tools and synthesis vendors by task, assumptions, and limitations.
OligoPool vs IDT OligoAnalyzer
Primer checks, privacy, and batch handling
OligoAnalyzer Alternatives
Primer analyzer, structure, and GC workflow choice
OligoPool vs NEB Tm Calculator
Tm settings, salt assumptions, and batch use
Tm Calculator Alternatives
NEB, IDT, Twist, Thermo, and vendor Tm workflows
Oligo Tool Guide
Choose by task, output, and privacy requirement
Tm Methods Compared
Method choice for sequence-level Tm results
Primer Tool Comparison
Primer3, OligoAnalyzer, NEB, and OligoPool