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DNA extraction is outdated! The lab discovered a precise amplification of aged blood.

StarLighter Blood Direct Amplification PCR Kit - Accurately amplify blood samples frozen for 20 months, and perform 6-plex PCR simultaneously
Mar 11th,2025 636 Views

StarLighter Blood Direct PCR Mix uses a unique PCR buffer system that can effectively reduce the effects of inhibitors in the blood on amplification, without the need for DNA purification or sample processing. Direct PCR using whole blood samples as template .


This kit is suitable for EDTA anticoagulated blood samples under different storage conditions. Single or multiplex direct blood amplification .

Technology Matrix

No DNA extraction required
StarLight Blood Direct PCR Mix is a 2× ready-to-use PCR premix containing a highly efficient DNA polymerase, dNTPs, MgCl2, reaction buffer, PCR enhancer, and stabilizer. PCR amplification can be performed by simply adding template, primers, and water. .

High inhibitor tolerance

The amount of EDTA anticoagulant blood added can be up to 30% of the total reaction volume

Compatible with different amplification primers
Ideal amplification can be achieved for primer types with different GC%/Tm values within 1kb

Wide coverage of sample types
Suitable for amplification of fresh blood, EDTA anticoagulated blood samples stored at 4°C, or frozen at -20°C

Product Application

1. Direct PCR amplification using EDTA anticoagulated blood;

2. Detection of genomic DNA fragments;

3. High-throughput genetic analysis and genotyping.

Applicable scenarios:

"Emergency blood sample collection and testing" in the clinical diagnosis room;

The genetic testing center "processes thousands of samples per day";

Forensic laboratory "Precise analysis of aged blood samples"

Competitive product comparison evidence

Suitable for multiple amplification, compatible with templates of different GC% contents, good amplification uniformity, and a wide range of blood input volumes

Fig.1 Electrophoresis results of hexaplex primer amplification using different proportions of fresh blood added to the blood direct amplification kits from Qihengxing and supplier T.

Blood direct amplification kits from Qihengxing and supplier T were used to perform direct amplification with six primers on fresh EDTA anticoagulated blood at different ratios, namely 5%, 10%, 15%, 20%, 25%, and 30%. The amplified fragment ranged from 200 to 800 bp, and the GC% ranged from 35% to 77%. After 35 cycles of amplification, the PCR products were detected by agarose gel electrophoresis.

The results show that Qihengxing Blood Direct Amplification Kit is superior to supplier T in terms of product quantity and amplification uniformity. .

Extreme Challenge Record:
Experimental plan


Result analysis:

Fig.2 Direct amplification results of EDTA anticoagulated blood stored at room temperature


Fig.3 Direct amplification results of EDTA anticoagulated blood stored at 4℃ for a certain period of time


The results showed that for EDTA blood samples stored under different conditions such as room temperature, 4°C, and -20°C, the Qihengxing Blood Direct Amplification Kit can accurately amplify the products of six items.

Product details consultation/product trial application:

010-62149251/15801217100 (same number on WeChat)

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