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EMCCDs Article Electron Multiplying Charge-Coupled Devices (EMCCDs)

By incorporating on-chip multiplication gain, the electron multiplying CCD achieves, in an all solid-state sensor, the single-photon detection sensitivity typical of intensified or electron-bombarded CCDs at much lower cost and without compromising the quantum efficiency and resolution characteristics of the conventional CCD structure.

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Observing Mitochondria in Epithelial Cells


Objective: UPlanSApo 100x oil/1.40 Exposure: 500 ms
Microscope: Olympus DSU/IX81 Gain: 3
Camera: Hamamatsu ImagEM Interval: 2 s

In most animal species, mitochondria appear to be primarily inherited through the maternal lineage, though some recent evidence suggests that in rare instances mitochondria may also be inherited via a paternal route. Typically, a sperm carries mitochondria in its tail as an energy source for its long journey to the egg. When the sperm attaches to the egg during fertilization, the tail falls off. Consequently, the only mitochondria the new organism usually gets are from the egg its mother provided. Therefore, unlike nuclear DNA, mitochondrial DNA doesn't get shuffled every generation, so it is presumed to change at a slower rate, which is useful for the study of human evolution. Mitochondrial DNA is also used in forensic science as a tool for identifying corpses or body parts, and has been implicated in a number of genetic diseases, such as Alzheimer's and diabetes. In this digital video, normal opossum kidney epithelial cells (OK line) are expressing the dimeric Katushka fluorescent protein fused to the mitochondrial targeting signal from subunit VIII of human cytochrome C oxidase.

BACK TO OK CELLS WITH dKATUSHKA-MITOCHONDRIA