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AAV Quality Grades

Which AAV Grade Is Right for Your Research?

AAV vectors are produced at different quality grades—Research, HT (High-Titer), and NHP (Non-Human-Primate) Grade—each defined by distinct purity, endotoxin, and safety specifications. Choosing the right grade depends on your experimental model, dosing requirements, and regulatory context. This guide compares the three grades to help you match the vector quality to your study needs.

Compare the GradesDiscuss Your Requirements
IntroductionNot all AAV preps are the same. Research Grade AAV is suitable for in vitro and pilot in vivo studies, HT Grade AAV offers the higher titers needed for systemic dosing in larger animals, and NHP Grade AAV meets tighter purity and endotoxin specifications required for non-human primate studies. The grade determines not only the vector quality but also the interpretability and reproducibility of your data.

Grade Comparison

AAV Quality Grades at a Glance

The table below summarizes the key specifications of Research, HT, and NHP Grade AAV vectors. Use this as a quick reference to identify which grade aligns with your experimental requirements.

Specification Research Grade HT Grade NHP Grade
Typical Titer (GC/mL) 1 × 10¹² – 1 × 10¹³ 1 × 10¹³ – 1 × 10¹⁴ 1 × 10¹³ – 1 × 10¹⁴
Purity (by SDS-PAGE) ≥ 85% ≥ 90% ≥ 95%
Endotoxin (EU/mL) < 10 < 5 < 1
Empty/Full Capsid Ratio Reported Reported, < 30% empty Reported, < 20% empty
Sterility Test Not routinely tested Tested Tested
Mycoplasma Not routinely tested Tested Tested
rcAAV Not routinely tested Tested Tested
Recommended Applications In vitro, pilot mouse studies Mouse, rat, larger animal dosing NHP, IND-enabling, safety studies

AAV Grade Offerings

Matching the Grade to Your Study

Each AAV grade is designed to support a specific stage of preclinical development. Understanding the distinctions helps you choose the appropriate vector quality for each study phase.

Research Grade AAV

Produced at standard scale with basic purification. Ideal for in vitro transduction optimization, proof-of-concept experiments, and early-stage mouse studies where cost efficiency is a priority. Suitable for screening multiple constructs or serotypes before committing to higher-grade production.

HT (High-Titer) Grade AAV

Concentrated to higher titers with additional purification steps to maintain purity. Designed for studies requiring systemic administration in rodents or larger animals, where higher doses are needed. Includes sterility, mycoplasma, and rcAAV testing for reliable in vivo data.

NHP Grade AAV

Highest purity and tightest quality specifications. Manufactured with enhanced purification, low endotoxin (< 1 EU/mL), controlled empty/full capsid ratio, and comprehensive safety testing. Required for non-human primate studies and IND-enabling toxicology and biodistribution assessments.

When to Choose Research Grade

You are in the early discovery phase, testing multiple AAV constructs or serotypes, and the readouts are in vitro or in small pilot mouse cohorts. Cost per prep matters more than absolute purity.

Best for early-stage screening and optimization where multiple variants need to be compared quickly.
When to Choose HT Grade

Your study involves systemic delivery in mice, rats, or larger species, and you need higher titers to achieve the required dose. You also want sterility and mycoplasma testing included without the full NHP specification.

Best for systemic rodent studies and dose-ranging experiments where higher titers are essential.
When to Choose NHP Grade

You are conducting non-human primate studies or generating data intended to support an IND. Endotoxin levels must be minimal, purity must be maximized, and full safety panels (sterility, mycoplasma, rcAAV) are required.

Best for NHP studies, IND-enabling work, and any study where vector quality directly impacts regulatory outcomes.

References

Further Reading on AAV Quality Grades

  1. AAV Vector Production Services — Creative Biolabs
  2. Adeno-Associated Virus Vector Platform — Creative Biolabs
  3. AAV Titer Determination — Creative Biolabs
  4. AAV Purification Services — Creative Biolabs

FAQ

Frequently Asked Questions About AAV Grades

HT Grade AAV is produced at higher titers (up to 1 × 10¹⁴ GC/mL) with additional purification and quality controls, including sterility, mycoplasma, and rcAAV testing. Research Grade is suitable for in vitro and pilot in vivo work, while HT Grade supports higher-dose systemic studies in larger animals.
NHP Grade AAV is required for non-human primate studies and for generating IND-enabling data. It meets the strictest purity (≥ 95%), endotoxin (< 1 EU/mL), and safety specifications needed for regulatory submission and reliable data in large animal models.
Research Grade AAV can be used for pilot in vivo studies in mice, but the lower purity and absence of routine sterility testing may introduce variability. For definitive or dose-ranging studies, HT or NHP Grade is recommended to ensure data quality and reproducibility.
Yes. Creative Biolabs can tailor AAV production to meet specific purity, titer, and testing requirements for each grade. Custom specifications can be defined to match your protocol, animal model, or regulatory needs. Contact our team to discuss your project.

Find the Right AAV Grade for Your Study

Share your vector design, target species, dosing requirements, and purity needs. Creative Biolabs can help select the appropriate grade and define the quality specifications for your project.

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