[學科] 生化 Glyoxylate cycle
檸檬酸循環中間產物 Oxaloacetate 可由PEP carboxykinase催化產生PEP
而PEP可以用來進行醣新生。
lehninger課本中這段
However, as an examination of the stoichiometry of the citric acid cycle shows,
there is no net conversion of acetate to oxaloacetate; in vertebrates,
for every two carbons that enter the cycle as acetyl-CoA, two leave as CO2.
但在第一階段的檸檬酸循環中，acetyl-CoA的2個碳到Oxaloacetate依然存在
而由Oxaloacetate --> PEP ，2個碳也最多有1個碳變成CO2離開
理論上acetyl-CoA至少有部分轉換為PEP進行醣新生
課本上所述重點在於net(完整的)acetyl-CoA去產生碳水化合物嗎?
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※ 編輯: tony15899 來自: 140.121.209.37 (10/23 23:16)