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C. The Tremendous Impact of Genetic Sequencing

Narrator: This is Science Today. There's no doubt that in recent years the sequencing of the genomes of a large number or organisms has made a major impact on science. At the University of California, San Francisco, the fairly recent sequencing of the yeast genome has changed the way experiments have been conducted in researcher Erin O'Shea's laboratory.

O'Shea: The ability to look for related proteins in other organisms and to determine if what one is studying in one organism is conserved in another organism - that's a very powerful thing.

Narrator: And the technology itself - including the use of DNA microarrays to study the expression of the transcription of all the genes in the genome at one time has also been very useful.

O'Shea: We're doing a lot of other things - most of them centered around understanding how cells sense and respond to things in their environment, whether they're a yeast cell or a human cell.

Narrator: For Science Today, I'm Larissa Branin.