Citric Acid cycle/Talk

Two questions:

• What's the source for this image? I notice it's been uploaded to Wikipedia, but where's it from?
• Shouldn't it be located at [Krebs Cycle]? (or, biologists, should that be Krebs cycle if it's often not used as a proper name)?

--Larry Sanger

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1. it's Krebs cycle (lower case) according to two biochem texts I have handy
2. no-one calls it that anymore really; almost always its referred to as citric acid cycle.

- Iwnbap