11.   Peel oranges and lemons, separate into sections and remove outer membranes and seeds.

12.   The other side of the brain, meanwhile, may tear away from the skull, rupturing veins and nerve fibers beneath its outer membrane.

13.   The only protein known to behave this way in animals is found in the outer membranes of certain nerve cells.

14.   The smothering pressure ruptures the outer membranes of bacteria and breaks apart crucial proteins.

15.   Their contents had diffused into the egg and only their outer membranes remained.

16.   When B. burgdorferi grows, it discards material called blebs from its outer membrane.

17.   The gene encodes a protein that recognizes the presence of lipopolysaccharides, a component of the outer membrane of bacteria.

18.   Tiller said the polymer kills bacteria by destroying the outer membrane of the microbe.