One cannot achieve an exponential speedup by treating the problems as structureless “black boxes,” consisting of an exponential number of solutions to be tested in parallel.
The group— from the laboratories of one of us (Collier) and George M.Whitesides—reasoned that a plugged heptamer would be unable to draw the factors into cells.
So the liver has all this fat being produced that it doesn't want sitting around inside it so it will also export some of the fat out in the form of free fatty acids.