Microarrays are a collection of DNA probes that are usually bound in defined positions to a solid surface, such as a glass slide, to which sample DNA fragments can be hybridised. The probes are generally oligonucleotides that are ‘ink-jet printed’ onto slides (Agilent) or synthesised in situ (Affymetrix). Labelled single-stranded DNA or antisense RNA fragments from a sample of interest are … Continue reading Microarrays