Enzyme enhances, erases long-term memories in rats; Can restore even old, fading memories, say scientists

ScienceDaily (2011-03-07) -- Even long after it is formed, a memory in rats can be enhanced or erased by increasing or decreasing the activity of a brain enzyme. For the first time, a study in behaving animals with functioning brains has found that a single molecule, PKMzeta, is both necessary and sufficient for maintaining long-term memory.

http://www.sciencedaily.com/releases/2011/03/110304092111.htm#