Their findings are published in Nature Genetics, on-line today. Roughly 3 metres of DNA is tightly folded into the nucleus of each cell in our body. This folding allows for some genes exam help be ‘expressed’, or activated, while with the exception of others. Dr Tim Mercer quiz help Professor John Mattick from Sydney’s Garvan Institute of Medical Research quiz help Professor John Stamatoyannopoulos from Seattle’s University of Washington analysed the genome’s 3D structure, at high decision. Genes are made of ‘exons’ quiz help ‘introns’ the former being the sequences that code for protein quiz help are expressed, quiz help the latter being stretches of noncoding DNA in between. As the genes are copied, or ‘transcribed’, from DNA into RNA, the intron sequences are cut or ‘spliced’ out quiz help the last exons are strung in combination exam help form exam help collection that encodes exam help protein.