NationMaster - Encyclopedia: Gene sequencing

Gene sequencing refers to the process of recording the exact sequence of nucleotides in the section of an organism's DNA corresponding to a specific gene. The complete genetic sequences of humans and many other organisms have been determined. Researchers sometimes sequence specific genes of an individual with a certain phenotype (such as a disease), in an attempt to discover the phenotype's genetic basis.

Notice (287 words)
	Sequencing of DNA has been one of the major feats in molecular biology.
	Two independent sequencing methods were invented in the middle seventies, one by Walter Gilbert, called the Maxam-Gilbert method or chemical method, and a second one by Fred Sanger called Sanger or chain termination method.
	The sequencing reaction has been modified into a PCR reaction, and the old way using radioactively labelled deoxynucleotides has been improved using dye-labelled bases.

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