False colour transmission electron micrograph (TEM) of circular DNA from a mitochondrion,the site of synthesis of chemical energy within the cell. The filament seen in image was collected from a fragmented mitochondrion. Such circular DNA molecules are 5-6 micrometers long,with a molecular weight of around 10 million; each mitochondrion has between 3 to 6. This relatively tiny amount of DNA is estimated to have a coding capacity of about 5,000 amino acids,and suggests that the mitochondrion needs to rely on a supplement of external DNA (from the cell nucleus) to synthesise its constituents. Magnification: X 150,000 at 35mm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Pol, Alain / ISM |
Bildgröße: | 3543 px × 2597 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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