I would like to suggest this paper for the Journal Club:

Ditzen M, Pellegrino M, Vosshall LB. Insect odorant receptors are molecular targets of the insect repellent DEET. Science 2008;319(5871):1838-42.

The title and abstract are written clearly. The structure of the paper, from hypothesis to behaviorial studies, to electrophysiological studies, to conclusions from the findings, is logical. Of course it helps that everybody can relate to the topic from personal (in the true sense of the word) experience.