How is microarray data analyzed?
There are two common methods for in depth microarray data analysis, i.e. clustering and classification [6]. Clustering is one of the unsupervised approaches to classify data into groups of genes or samples with similar patterns that are characteristic to the group.
What is microarray procedure and application?
The principle behind microarrays is that complementary sequences will bind to each other. The unknown DNA molecules are cut into fragments by restriction endonucleases; fluorescent markers are attached to these DNA fragments. These are then allowed to react with probes of the DNA chip.
What are the major steps in preparing a microarray experiment?
There are three major steps involved in a typical experiment involving a microarray: preparation of microarrays; preparation of fluorescently labeled cDNA probes and hybridization; and finally scanning, image and data analysis.
What are the tools used in microarray analysis?
Only three tools can handle all types of classical microarrays, namely ArrayExpress and NCBI GEO for storage and Bioconductor for analysis.
What is microarray data in bioinformatics?
A “microarray” is a laboratory slide made of glass whose surface is provided with thousands of small pores in defined positions. It works under the principle of hybridization of complementary strands of DNA and enables us to analyze expressions of multiple genes in one reaction in an effective manner.
What is microarray technique?
Microarray technology is a developing technology used to study the expression of many genes at once. It involves placing thousands of gene sequences in known locations on a glass slide called a gene chip. A sample containing DNA or RNA is placed in contact with the gene chip.
What is a microarray made of?
The DNA microarray is a tool used to determine whether the DNA from a particular individual contains a mutation in genes like BRCA1 and BRCA2. The chip consists of a small glass plate encased in plastic. Some companies manufacture microarrays using methods similar to those used to make computer microchips.
Which database is microarray gene expression?
Microarray databases
| Database | Scope |
|---|---|
| ImmGen database | Open access across all immune system cells; expression data, differential expression, coregulated clusters, regulation |
| Genevestigator | Gene expression search engine based on manually curated, well annotated public and proprietary microarray and RNA-seq datasets |