Quintara Biosciences provides reliable, high-quality plasmid preparation services tailored to meet both research and production-scale needs. Our QuinDirect Plasmid prep is engineered for reliability, with a unique yield guarantee that ensures you receive the exact amount of high-quality plasmid DNA required to advance your research without delay. The processes of QuinUp plasmid prep are designed for scalability, delivering from Mini-preps for initial validation to large-scale production-grade Giga-preps.
To ensure the highest standards, every plasmid undergoes rigorous QC testing. Clients can choose from over 10 different QC analyses to create a custom verification package. This flexibility, combined with our efficient workflows, ensures not only rapid delivery but also unwavering quality and dependability.
2026 New Year Promotion
Offer:
20% off QuinUp Plasmid prep for new customers ordering through QuinGo online portal.
Terms and Condition:
・The promotion is applied for the customers who never order QuinUp Plasmid prep service at Quintara before.
・You can get promotion price when you place the first QuinUp preps order using the promo code”PlasmidNew”, and the price starts from $7.99/construct.
・The discount is only applied for plasmid preps, add-ons are not included.
・The promotion is valid until Jan 31,2026 .
・Quintara reserves all rights to this promotion.
Fast Turnaround
(start from 1 day)
Flexible Scales
(µg to mg)
Industry-leading Low Endotoxin Level
Flexible QC Options
High GC, repeat fragments and etc.

Our cutting-edge Plasmid DNA Preparation Services are focused on quality, customization, and expertise. We can screen colonies directly from agar plates, verify your plasmids’ sequences and provide you with µg to mg quantities of your constructs.
Our services provide seamless scalability, rigorous quality control, and expert guidance, ensuring your scientific endeavors thrive in the ever-evolving landscape of molecular innovation.
QuinDirect Plasmid Prep Service is bundled with gene synthesis

Fast Turnaround

Targeted guraranteed yield

10 QC testing

Tailored Service
| Research Grade | |
| Quantity | Turnaround Time business day |
| 100 μg | 2 ~ 3 |
| 200 μg | 2 ~ 3 |
| 500 μg | 2 ~ 3 |
| 1 mg | 3 ~ 5 |
| 2 mg | 3 ~ 5 |
| 10 mg(High-copy) | 5 ~ 7 |
| 10 mg(Low-copy) | 5 ~ 7 |
| >10mg | Inquiry |
| Transfection Grade | |
| Quantity | Turnaround Time business day |
| 100 μg | 2 ~ 3 |
| 200 μg | 2 ~ 3 |
| 500 μg | 2 ~ 3 |
| 1 mg | 3 ~ 5 |
| 2 mg | 3 ~ 5 |
| 10 mg(High-copy) | 5 ~ 7 |
| 10 mg(Low-copy) | 5 ~ 7 |
| >10mg | Inquiry |
* The turnaround time applies for the step of plasmid prep.
| Specification | Research Grade | Transfection Grade | |
| Appearance | Colorless, clear, free of precipitation or foreign particles | ||
| Sequence Accuracy | Sequencing verification matches the order requirements | ||
| A260/280 | 1.8-2.0 | ||
| A260/230 | ≥2.0 | ||
| Supercoiled Content | Supercoiled | Predominately | ≥80% |
| Residual RNA | Not visible on agarose gel electrophoresis | ||
| E. coli Genomic DNA | <15% on agarose gel electrophoresis | ||
| Restriction Analysis | DNA bands with expected sizes detected by agarose gel electrophoresis | ||
| Endotoxin Level | Endotoxin | Low | ≤0.01EU/ug |
| Bio-Burden Test | No viable microorganisms in/on culture media |
QuinUp Plasmid Prep Service is stand-alone service, need customer send the template to us.

Same day pickup/shipping

Fast Turnaround

Local Production

Flexible QC options
| Plasmid Type | Quantity (High Copy) | Quantity (Low Copy) | Turnaround Time business day |
| Miniprep | 5-10ug | 2ug | 1 |
| Midi - prep - TG (Low Endotoxin) | 100-200 μg | 20 μg | 3 |
| Maxiprep - TG (Low Endotoxin) | 300-500 μg | 50 μg | 4 |
| Megaprep - TG#1 (Low Endotoxin) | 0.8-1 mg | 500 μg | 4 |
| Megaprep - TG#2 (Low Endotoxin) | 1.5-2 mg | 1 mg | 5 |
| Gigaprep - TG (Low Endotoxin) | 4-5mg | 2 mg | 5 |
* The turnaround time applies for the step of plasmid prep.
| Items | Specification | Mini Prep | Midi and Above |
| Appearance | Clear, no visible particles | ||
| A260/280 | 1.8 - 2.0 | ||
| A260/230 | ≥2 | ||
| Label | Correct and white | ||
| Concentration | By UV Spectroscopy | ||
| Sterility Test | No growth in blank media after 48 hours | ||
| Concentration Normalization | The error range is within 5% | ![]() | |
| Restriction Analysis | Conforms to reference | ![]() | ![]() |
| Endotoxin Test | Verified (Suggest for Endo - Free Preps) | ![]() | ![]() |
| Sanger Sequencing | Correct | ![]() | ![]() |
| WPS Standard | Correct | ![]() | ![]() |
| Bacterial Glycerol Stock | Shipped | ![]() | ![]() |
| Aliquot | Turnaround dependent on # of aliquots | ![]() | ![]() |

Plasmid DNA (4 μg)
Glycerol Stock (200 μL frozen stock)
Bacterial Colony (fresh colonies<3 days old)

We provide local courier services in MA, CA, CO, CT, MD, and NJ.
Email:sales.us@quintarabio.com for drop-box locations and shipping instructions.
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