Editing Metabolic pathway (section)

===Amphibolic pathway (Amphibolism)===
[[File:Amphibolic Properties of the Citric Acid Cycle.gif|Amphibolic properties of the citric acid cycle|thumb|506x506px]]

An '''[[amphibolic|amphibolic pathway]]''' is one that can be either catabolic or anabolic based on the availability of or the need for energy.<ref name="Clarke"/>{{rp|570}} The currency of energy in a biological cell is [[adenosine triphosphate]] (ATP), which stores its energy in the [[High-energy phosphate|phosphoanhydride bonds]]. The energy is utilized to conduct biosynthesis, facilitate movement, and regulate active transport inside of the cell.<ref name="Clarke"/>{{rp|571}} Examples of amphibolic pathways are the citric acid cycle and the glyoxylate cycle. These sets of chemical reactions contain both energy producing and utilizing pathways.<ref name="Voet, Voet, Pratt"/>{{rp|572}} To the right is an illustration of the amphibolic properties of the TCA cycle.

The [[glyoxylate cycle|glyoxylate shunt pathway]] is an alternative to the [[Citric acid cycle|tricarboxylic acid (TCA) cycle]], for it redirects the pathway of TCA to prevent full oxidation of carbon compounds, and to preserve high energy carbon sources as future energy sources. This pathway occurs only in plants and bacteria and transpires in the absence of glucose molecules.<ref>{{cite book| veditors = Pray L, Relman DA, Choffnes ER <!--rapporteurs, Forum on Microbial Threat, Board on Global Health, Institute of Medicine of the National Academies-->|title=The science and applications of synthetic and systems biology workshop summary|date=2011|publisher=National Academies Press|location=Washington, D.C.|isbn=978-0-309-21939-6|page=135}}</ref>