Concept
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The Energy-Requiring Steps of Glycolysis
The first half of glycolysis: investment
The first half of glycolysis uses two ATP molecules in the phosphorylation of glucose, which is then split into two three-carbon molecules.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Glycolysis. October 16, 2013."
http://cnx.org/content/m44432/latest/Figure_07_02_01.jpg
OpenStax CNX
CC BY 3.0.