DNA packaging. Computer artwork showing how DNA (deoxyribonucleic acid) is packaged within cells. Two DNA strands,consisting of a sugar-phosphate backbone attached to nucleotide bases,twist into a double helix (left). The DNA double helix is tightly coiled around histone proteins (green spheres) which are tightly packaged together in groups of eight to form nucleosomes (upper right). These are then coiled together (centre) and further packaged into chromosomes (centre right). Each human cell contains 23 pairs of chromosomes,which contain all the body's genetic information | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Dalhoff, Henning |
Taille de l’image : | 4632 px × 3791 px |
Model Release : | Non requis |
Restrictions : | - |