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ENCODE, the Encyclopaedia of DNA Elements, is the most ambitious human genetics project to date. It takes the 3 billion letters described by the Human Genome Project in 2000, and tries to explain them. Remarkably, ENCODE scientists have managed to assign a biochemical function to 80% of the genome, including the genes and the parts of the genome that tell those genes what to do. This information is helping us understand how genomes are interpreted to make different types of cells and different people -- and crucially, how mistakes can lead to disease. In this video, ENCODE's lead coordinator, Ewan Birney, and Nature editor Magdalena Skipper talk about the challenges of managing this colossal project and what we've learnt about our genomes.

To read the research papers and more, visit http://www.nature.com/ENCODE

RNA interference (RNAi) is an important process, used by many different organisms to regulate the activity of genes. This animation explains how RNAi works and introduces the two main players: small interfering RNAs (siRNAs) and microRNAs (miRNAs). We take you on an audio-visual journey, diving into a cell to show how genes are transcribed to make messenger RNA (mRNA) and how RNAi can silence specific mRNAs to stop them from making proteins. The animation is based on the latest research, to give you an up-to-date view.

If you'd like to know more about the structures and processes you see in this video, check out the accompanying slideshow: http://www.nature.com/nrg/multimedia/...

Sponsor message (May 2014): Dharmacon RNAi products are now part of GE Healthcare. Learn more at http://www.GELifeSciences.com/Dharmacon