plant cell, whole plants can sometimes be regenerated from the cell.
Genes typically contain regions of DNA sequences including a promoter and a transcribed region. The transcribed region normally contains a 5' untranslated region, a coding sequence, and a 3' untranslated region.
The promoter contains the DNA sequence necessary for the initiation of transcription, during which the transcribed region is converted into mRNA. In eukaryotic cells, the promoter is believed to include a region recognized by RNA polymerase and a region which positions the RNA polymerase on the DNA for the initiation of transcription. This latter region, which is referred to as the TATA box, usually occurs about 30 nucleotides upstream from the site of transcription initiation.
Following the promoter region is a sequence that is transcribed into mRNA but isM.D., M.S., Ph.D., is a medical surgeon and public nutrition researcher at the National Institute of Public Health in Mexico City. He has been a consultant for the WHO, the Pan American Health Organization, the World Bank, the International Food Policy Research Institute and the International Association of Agricultural Economists in the fields of nutrition, obesity and chronic diseases. Barquera is also President of the Nutrition Board of Professors at the Mexican School of Public Health as well as Director of the Nutritional Epidemiology Division at the Nutrition and Health Research Center.

Susan Barr, Ph.D., R.D., is a professor at the University of British Columbia, where she teaches human nutrition. She has served as chairperson of the Institute of Medicine’s Subcommittee on Interpretation and Uses of Dietary Reference Intakes