Sequencing means determining the exact order of the base pairs in a segment of DNA. Human chromosomes range in size from about 50,000,000 to 300,000,000 base pairs. Because the bases exist as pairs, and the identity of one of the bases in the pair determines the other member of the pair, scientists do not have to report both bases of the pair. The primary method used by the HGP to produce the finished version of the human genetic code is map-based, or BAC-based, sequencing.

Completing the genome sequence is just the first step. See a list of post-sequencing research challenges on the Sequencing Fact Sheet.

See an index of the primary papers published about the sequence and a list of insights learned from this information.

The sequencing of the H. pylori genome may lead to the development of new vaccines and might allow us to think up new ways of killing the organism by inhibiting some of its essential parts.

When the zebrafish genome project was started in spring 2001, we chose two different strategies to obtain the sequence which is estimated to have a size of 1.6 to 1.7 Gb. The first strategy is the traditional clone mapping and sequencing technique. The BAC libraries CHORI211 and DanioKey were chosen and fingerprinted to generate a map. From this map a tiling path is calculated that covers the genome sequence clone by clone.

Knowing the DNA sequence is important because it affects such attributes as appearance, response to particular medicines, and resistance to infections and toxins. It may even influence behavior. Some sequence variations also can cause or contribute to such disorders as those found on the chromosomes presented in this Web site.

When you input the sequence in GenScript siRNA design center, our computer is calculating in the background to filter out all the homologous sequence in the genome so that the target sequence is specific. More than that, the ranking also reflects the specificity of a siRNA target site.

A genome is an organism's complete set of deoxyribonucleic acid (DNA), a chemical compound that contains the genetic instructions needed to develop and direct the activities of every organism. DNA molecules are made of two twisting, paired strands. Each strand is made of four chemical units, called nucleotide bases. The bases are adenine (A), thymine (T), guanine (G) and cytosine (C). Bases on opposite strands pair specifically; an A always pairs with a T, and a C always with a G.

The strain sequenced for the systematic genome project was S288C. The standard genotype of S288C is matalpha gal2 mal. In addition, the chromosome IV sequence is from S288C derivative that contained a nonsense (ochre) mutation in the TRP1 gene. The systematic sequence shows no defect in the GAL2 gene, so it's not certain whether the strain sequenced was actually a gal2 mutant.

The most common task in bioinformatics must be the acquisition of some bioinformatics data on which to operate. Usually this in the form of a nucleic acid or protein sequence, stored as characters in the appropriate alphabet together with a header of related information: for example some kind of unique identifying number the species from which the original biological substrate was obtained, the names of any authors who published the sequence and so on.

A genome is all the DNA in an organism, including its genes. Genes carry information for making all the proteins required by all organisms. These proteins determine, among other things, how the organism looks, how well its body metabolizes food or fights infection, and sometimes even how it behaves. DNA is made up of four similar chemicals (called bases and abbreviated A, T, C, and G) that are repeated millions or billions of times throughout a genome.

There are many software packages that can do this type of analysis. The GCG software package contains the Composition tool, which will determine the composition of sequences along with dinucleotide and trinucleotide content for nucleotide sequences. Click here for an example of the results from the Composition program run on the yeast genome. The S288C strain that was sequenced for the systematic sequencing project has a nonsense mutation in TRP1; the sequence in SGD reflects this.

Multiple organisms can be screened for simultaneously in the same test regardless of whether they are bacterial, viral, fungal, parasitic, or any mixture thereof; and the specific causative pathogen(s) definitively identified. The theoretical upper limit for the panel size is probably in the range of 20 or so unrelated organisms but significantly more if they are related (for example, subtypes of E. coli or the Human Papilloma Virus ? HPV).

Power sequencing indicates that the power voltages in a multi-power system are not ramping up at the same time, therefore signals from difference power source applied to a device while its Vcc is not reaching nominal voltage yet and causing problem.