Related Experiment Video
Updated: May 2, 2026
Enhanced Genetic Analysis of Single Human Bioparticles Recovered by Simplified Micromanipulation from Forensic ‘Touch DNA’ Evidence
Published on: March 9, 2015
Developmental validation of a forensic rapid DNA-STR kit: Expressmarker 16
Huaigu Zhou1, Dan Wu1, Ronghua Chen1
1Institute of Forensic Science, Shanghai Municipal Public Security Bureau/Key Laboratory of Forensic Evidence and Scene Technology, Ministry of Public Security/Shanghai Key Laboratory of Crime Scene Evidence, Shanghai 200083, China.
The ExpressMarker 16 (EX16) forensic kit significantly reduces DNA Short Tandem Repeat (STR) analysis time to 35 minutes. This rapid DNA profiling tool enhances criminal investigations by enabling faster results for multiple STR loci.
Area of Science:
- Forensic Science
- Molecular Biology
- Genetics
Background:
- DNA Short Tandem Repeat (STR) analysis is crucial in forensic science.
- Faster analysis times are required for efficient criminal investigations.
- Existing STR kits may have limitations in speed and multiplexing capabilities.
Purpose of the Study:
- To introduce and evaluate the ExpressMarker 16 (EX16) forensic kit.
- To assess the kit's ability to shorten DNA amplification and analysis times.
- To validate the performance of EX16 for forensic applications.
Main Methods:
- Development of the ExpressMarker 16 (EX16) kit for co-detection of 16 STR loci.
- Optimization of Polymerase Chain Reaction (PCR) protocols, including annealing temperature research.
- Validation through various forensic tests: DNA mixtures, stutter ratios, species specificity, inhibitor tolerance, sensitivity, and parallel testing against FBI Quality Assurance Standards (QAS).
Main Results:
- The EX16 kit successfully co-detects 16 STR loci, including 13 CODIS loci, D2S1338, D6S1043, and Amelogenin.
- Amplification time was reduced to a minimum of 35 minutes.
- Validation tests confirmed the kit's reliability and performance according to established forensic standards.
Conclusions:
- The ExpressMarker 16 (EX16) kit provides a rapid and effective solution for DNA STR analysis.
- EX16 facilitates faster criminal investigations through significantly reduced analysis times.
- The kit meets rigorous forensic standards, making it a valuable tool for forensic laboratories.
