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I am reading the following journal paper and I have come across the following statement:

Overexpression of GSK-3β significantly increases motile mitochondria in a Tau protein-dependent manner. However, GSK-3β does not alter mitochondrial velocity or mitochondrial run length.

I understand what mitochondrial velocity is but I am not sure what exactly is meant by mitochondrial run length. Any insights are appreciated.

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Run length means how far the mitochondria move, each time they move.

The article this references is:

"GSK3β Is Involved in the Relief of Mitochondria Pausing in a Tau-Dependent Manner".

This article has a figure showing the distances in micrometers, although I have trouble working out interpreting the error bars on the graph to see if the distances ("run length") are really different.

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