DNA Microarray

A DNA microarray is a laboratory analytical platform enabling simultaneous detection and quantification of thousands of genetic variations, gene expressions, or sequence polymorphisms through nucleic acid hybridisation-based techniques. The microarray approach provides high-throughput genetic characterisation exceeding throughput of conventional sequential analysis methods.

DNA microarray technology employs glass or silicon chip surfaces with thousands of immobilised DNA probes representing specific genetic sequences or genes. Sample DNA molecules (typically fluorescently-labelled) hybridise (bind) to complementary probes through Watson-Crick base pairing. Washing removes unbound sample. Automated scanning detects fluorescence at each probe location. Spot intensity correlates with target DNA abundance enabling quantification.

Microarray applications span forensic genetic profiling enabling rapid suspect identification through comprehensive genetic marker analysis, gene expression profiling identifying disease-specific transcription patterns, and copy number variation (CNV) detection identifying chromosomal abnormalities. High-throughput capability enables analysis of complete genetic profiles within hours exceeding sequential analysis throughput by orders of magnitude.

Analytical advantages include simultaneous characterisation of multiple targets reducing analysis time, sensitivity detecting picogram DNA quantities enabling trace evidence analysis, and cost-effectiveness enabling high-volume screening without prohibitive expense. Multiplexing enables comprehensive genetic assessment without increase in specimen volume.

Data analysis employs pattern recognition algorithms identifying positive signals distinguishing genuine markers from background noise. Comparison against reference databases enables individual identification or disease characterisation.

In Pakistan, DNA microarrays support law enforcement forensics and medical diagnostics.

Tactical Supply Pakistan supplies DNA microarray systems for forensic and diagnostic analysis applications.