Mad cow disease,composite image. At top left is a molecular model showing the secondary structure of a prion protein,the causative agent of bovine spongiform encephalopathy (BSE) in cows and Creutzfeldt-Jakob disease (CJD) in humans. At bottom right are prions and a computer model of the brain. Above this are brain scans showing aggregations (pink) of prions. Unlike other infectious agents prions do not have a nucleic acid genome for replication. Instead,the abnormal infectious prions change normal prions,found in cell membranes,to the abnormal form. This leads to a build up of protein plaques. BSE and CJD are fatal neurodegenerative diseases characterised by progressive dementia and a rapid deterioration in co-ordination. For a similar version of this image,see C028/6342 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Medi-mation |
Bildgröße: | 2799 px × 2496 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |