Questions About Cancer? 1-800-4-CANCER

Understanding Cancer Series

  • Posted: 01/28/2005
  • Reviewed: 09/01/2006

Slide 2



The story of gene testing begins with DNA.

DNA is a vast chemical information database. It resides in the core, or nucleus, of each of the body's trillions of cells, and it carries the complete set of instructions for making all the proteins a cell will ever need.