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 (upper right). The DNA double helix is tightly coiled around histone proteins which are tightly packaged together in groups of eight to form nucleosomes (spheres). These are then coiled together (bottom left) and further packaged to form chromosomes. Each human cell contains 23 pairs of chromosomes,which contain all the body's genetic information | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Osterwalder, Hans-Ulrich |
Taille de l’image : | 4979 px × 3521 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |