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Technology Overview


Illumina iScan SystemiScan BeadArray Technology Overview

Illumina iScan System utilizes BeadArray technology for a broad range of DNA analysis applications including genotyping and methylation studies. The 3-micron silica beads are assembled in microwells on slide with high density, enabling multi-sample per slide. Each bead is covered with hundreds of thousands of copies of a specific oligonucleotide that act as the capture sequences in one of Illumina’s assays. Different combinations of probe design enable a wide range of applications on a whole-genome scale, including gene- and exon-level analysis, genotyping and resequencing.

The iScan platform at the Core can perform the following analysis:

  • Whole genome SNP genotyping
  • Whole genome methylation analysis
  • Whole genome copy number variation (CNV) analysis
  • Custom SNP genotyping

A typical iScan BeadChip experiment (Infinium) includes the following steps:

  • Preparation of DNA isolated from specimens
  • Hybridization of sample to BeadChips
  • Stringent washes, single base extension, staining and imaging of BeadChips
  • Analysis of scanned images and data extraction

For details of iScan BeadArrayTechnology and products, please visit Illumina iScan website.



  Ms Jade Leung
  Ms Rachel Li
  Ms Lilian Cheng
  Mr Carlos Choi
  Ms Schwan Lui
  Ms Levina Lam

  Telephone: 2831 5467 / 2831 5477 / 2831 5478
  Email: iscan.cpos@hku.hk