False colour transmission electron micrograph of Lambda bacteriophages showing intact (black) & squashed (clear) particles. Bacteriophages are viruses that infect only bacterial cells. Lacking any reproductive machinery themselves,they infect bacteria & commandeer their apparatus for purposes of replication. The genetic material (DNA) of the phage is contained within the head,a 20-faced (icosahedron) figure made up of numerous subunits called capsomers. The head is attached to a tail,which in this species is noncontractile. Entry into the bacteria is achieved by enzyme action. Magnification X31,400 at 35mm size. Original is bw print m090/042 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / BIOZENTRUM, UNIVERSITY OF BASEL / DR M. WURTZ |
Taille de l’image : | 4828 px × 3618 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |