In order to understand our biology, researchers need to investigate not only what cells are doing, but also more specifically what is happening inside of cells at the level of organelles, the specialized structures that perform unique tasks to keep the cell functioning. However, most methods for analysis take place at the level of the whole cell. Because a specific organelle might make up only a fraction of an already microscopic cell’s contents, “background noise” from other cellular components can drown out useful information about the organelle being studied, such as changes in the organelle’s protein or metabolite levels in response to different conditions.
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Source: Phys.org