I'm trying to find words, but I'll let the article do it:
"The protein, called tau protein,
normally functions as a stabilizer for the microtubules that act as
rails for transporting materials around the cell. As New Scientist
reported, studies have suggested problems with the tau protein is
somehow linked to Alzheimer’s. The protein can clump together in twisted
tangles and could be releasing Alzheimer’s-inducing toxic chemicals."
It's another step in beating debilitating diseases like Alzheimer's, and that's a very welcome thing.