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Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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Q bands
Q bands: The alternating bright and dull fluorescent bands seen on chromosomes under ultraviolet light after the chromosomes are stained with quinacrine. The Q stands for Quinacrine, an agent used as an antimalarial agent and, in the laboratory, as a fluorescent dye.