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Everything about DNA microarray

Collection of microscopic DNA spots attached to a solid surface

A DNA microarray is a collection of microscopic DNA spots attached to a solid surface. Scientists use DNA microarrays to measure the expression levels of large numbers of genes simultaneously or to genotype multiple regions of a genome. Each DNA spot contains picomoles of a specific DNA sequence, known as probes. These can be a short section of a gene or other DNA element that are used to hybridize a cDNA or cRNA sample under high-stringency conditions. Probe-target hybridization is usually detected and quantified by detection of fluorophore-, silver-, or chemiluminescence-labeled targets to determine relative abundance of nucleic acid sequences in the target. The original nucleic acid arrays were macro arrays approximately 9 cm × 12 cm and the first computerized image based analysis was published in 1981. It was invented by Patrick O. Brown. An example of its application is in SNPs arrays for polymorphisms in cardiovascular diseases, cancer, pathogens and GWAS analysis. It is also used for the identification of structural variations and the measurement of gene expression. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: DNA microarrayA 5-minute orientation
  2. Skim a recent paper: Validation of the new EPIC DNA methylation microarray (900K EPIC v2) for high-throughput profiling of the human DNA methylomeInfluential work since 2022
  3. Pick up a classic book: Molecular analysis and genome discoveryThe most-reprinted book on the subject
  4. Read the landmark paper: Quantitative Monitoring of Gene Expression Patterns with a Complementary DNA MicroarrayCited 7,157 times
  5. Go sideways: Microarray analysis techniquesA closely related topic
  6. Go sideways: RNA spike-inA closely related topic

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