What is the genome browser?
Genom browser is a web interface used to view the physical map of the chromosome. This map shows how much DNA separates two genes, measured in pairs of bases. Human chromosomes range from 50 million to more than 250 million pairs of bases. The genome browser shows the schematic representation of whole chromosomes as well as the "zoom" of the diagrams of individual genes and even the actual sequence of pairs of bases. Many genome browsers allow the user to approach the real DNA sequence level, although the actual usefulness of the browser is in the ability to view genes in their larger context rather than to display DNA sequence at nucleotides. The average size of the gene is 3,000 pairs of bases, so when they approach the level of a pair of basic couples, the user will see less than the whole gene. The largest human gene, dystrophin, has 2.4 million pairs of bases long.
In addition to the monitoring scheme, the genome browser can also show other useful information. This may include partA gene that is translated into a protein called mRNA, and DNA sequences that have other functions other than coding for protein. The genome browser can also show which DNA segments were used in the process of sequencing the genome.
A large number of organisms have sequence genomes. There is no single browser that is standard for the genomic field, so the genome browsers may vary between sequence genomes. Genome browsers have a function of being able to find genes or sequences, allowing the user to jump from one genomic location to another. It would not be effective to move through the chromosome to get interest because of the very large size of most chromosomes.
Some genome browsers have tools called GUNE sorters. This tool will dissolve the table of genes that relate to each other. The relationship can be one of several types: sequence homology, similar to express profile orgenomic closeness. The user is looking for a gene using a word or phrase, selecting the type of relationship he wants, and the gene sorter shows the search results.