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Anonymous
I find this hard to believe.
For those not in the know, myostatin(mstn) is a molecule called a mitogen, a regulator of the cell cycle. In layman's terms, it is a molecule that tells a cell to divide, or not to divide. Most muscle cells are thrown into a phase of the cell cycle called G0, in which they do not proliferate or divide.
Myostatin is partly responsible for this cell cycle arrest, so organisms (like these myostatin knockout mice) have muscles that continue to divide and grow. For more examples of this, look up bully whippets and belgian blue cows. These are two breeds of animals with a myostatin removing mutation.
This mutation has only been seen in humans a couple of times. Though it sounds cool, in the animals it appears in, it also comes with severe health issues.
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