Product selection guide

What does 83× Taq fidelity mean for a PCR master mix?

YEASEN reports fidelity of 83× Taq and 9× standard Pfu for 10166 in its product manual. These figures describe the manufacturer’s relative-fidelity tests. A direct comparison with Q5 or other brands requires matching test methods.

By Direct Lab Supplies · Guide updated 2 October 2026

Based on manufacturer specifications. Product documents and sources.

Where does the 83× figure come from?

YEASEN reports this relative-fidelity figure in its 10166 product manual, revision EN20260712.

This is YEASEN's reported comparison with Taq and standard Pfu. The manual does not include a full comparative error-measurement dataset, so the figure cannot be used to rank fidelity across different manufacturers' assays.

Sources: YEASEN 10166 manual — body revision EN20260712

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What is the difference between fidelity, speed and yield?

Fidelity describes copying accuracy, extension rate affects PCR timing, and yield is the quantity of amplified product. Compare each specification for your template and protocol; the relative-fidelity figure does not predict yield.

Manufacturer-reported fidelity, speed and fragment length
Claim	What it describes	What it does not mean
83× Taq / 9× standard Pfu	YEASEN's stated relative fidelity for 10166	83-fold higher yield or mutation-free products
5–10 seconds/kb	10166 extension guidance with length-dependent conditions	The full PCR run time or one rate for every template
Up to 15 kb / as fast as 1 second/kb	Separate range and speed statements for rapid Taq mix 10167	High fidelity or the fastest rate at the maximum length

Sources: YEASEN 10166 manual — body revision EN20260712; YEASEN 10167 manual — body revision EN20260324

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What else matters when selecting 10166?

10166 is a 2× complete master mix with loading dye and blunt-ended products, not a separate enzyme vial. YEASEN lists a 20–80% GC range. Its webpage FAQ describes 1–14 kb cDNA amplification, while the manual gives length-dependent guidance without a universal upper limit for all templates.

If your purchase depends on a particular long target, request manufacturer confirmation for that template and application. Do not transfer the cDNA length claim to every genomic or other DNA format.

Sources: YEASEN 10166 manual — body revision EN20260712; Yeasen 10166 specifications

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Which product should be on your shortlist?

Consider 10166 when the high-fidelity, long-fragment and blunt-end format is relevant. Consider 10108 for hot-start genotyping or 10167 for rapid endpoint PCR when those are the stated needs. Compare pack prices once you have chosen the formulation you need.