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Crossing Guard Found in Mitochondrial Membranes

This is no ordinary crossing guard. It also acts as a bouncer or cop when bad proteins try to clog up the channel.

Cell's Molecular Machines Arouse Fascination

With increasing image quality at their disposal, biologists are finding amazing molecular machines at work in living cells.

Your Copper Pipes

Each of us is part metal. Our bodies contain iron, copper, zinc, magnesium, manganese, vanadium, molybdenum, selenium, and even nickel like the coins in our pockets or purses. Unlike the other common elements of life (carbon, oxygen, hydrogen, calcium, nitrogen, phosphorus), our metals are not synthesized and recycled, but must be imported and handled with care. Copper is a good example of a biological metal that performs multiple useful functions – that is, unless something goes wrong with the machinery handling it.

Cell Operations Amaze, Inspire

A student's view of a cell under a light microscope is misleading.  It reveals only a tiny fraction of what is really going on.  Within that package of life, invisible to the student's gaze, complex machines work together in cellular factories.  Signals pass back and forth in complex networks.  Libraries of code are transcribed and […]
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