The copying of DNA's master instructions into messenger molecules of RNA, a process known as DNA transcription, has always been thought to be a unidirectional process whereby a copying machine starts and moves in one direction. But in work that represents a fundamental shift in scientists' understanding of the phenomenon, MIT researchers have found evidence that two DNA copying machines frequently start from the same site and move in different directions.
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Dan Graur has suggested some changes to the classification of DNA.
Did you know small fragments of DNA are circulating in your blood stream?
tags: How DNA is Replicated in a Living Cell, biology,
Ethidium is a dye that's used in molecular biology to allow DNA to be visualized. Regular DNA isn't colored; it absorbs ultraviolet but not visible light, so you need to use tricks like making the DNA radioactive (which makes it pretty easy to spot), or using dyes that selectively bind to DNA.
woot. Can't wait for it to get online on NCBI.
http://www.ncbi.nlm.nih.gov/pubmed/19056940?ordinalpos=1&itool=EntrezSy…
or, as an alternative, I will get on the nerves of a liberian at my university. :)