I've only just arrived https: // www.mirandaharvey.com/stmap_1266d34.html bupropion uk Scientists have long known that the main culprits in Alzheimerâs are two proteins that gunk up the brain: autopsy studies performed over a century ago showed plaques of sticky amyloid protein clogging the spaces between nerve cells, while tangles of twisted tau protein threads were destroying cells from within.