Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

PEP

The substrate PEP (phosphoenol pyruvate) is used to fix carbon in C4 plants and CAM plants. In a reaction catalyzed by PEP-carboxylase, it forms oxaloacetate (OAA), a four-carbon acid. OAA is quickly converted to malic acid. Phosphoenolpyruvic acid has the content C3H5O6P.

磷酸烯醇丙酮酸（PEP）用于C4植物和CAM植物中固定碳。在PEP羧化酶催化下，它形成乙酰乙酸（OAA），一种四碳酸。OAA迅速转化为苹果酸。磷酸烯醇丙酮酸的化学式为C3H5O6P。
PEP wiki
PEP维基
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Organic chemistry concepts

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Reference
Karp
Ch 3

Moore, et al.
Ch 7
索引 有机化学概念 化学概念 参考 Karp 第3章 Moore 等人 第7章
 
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RuBP

Rribulose 1,5-biphosphate

核糖-1,5-二磷酸

RuBP (ribulose 1,5-biphosphate) is a five-carbon sugar which reacts with CO2 in the first step of the Calvin cycle for fixing carbon in photosynthetic systems. That reaction is catalyzed by the large enzyme rubisco . The catalytic reaction with RuBP and carbon dioxide through a short-lived intermediary almost instantaneously produces two molecules of glycerate 3-phosphate (3PGA).

RuBP wiki
RuBP 词条
RuBP（核糖-1,5-二磷酸）是一种五碳糖，它在光合作用系统中固定碳的卡尔文循环的第一步中与CO₂反应。该反应由大型酶rubisco催化。RuBP与二氧化碳通过一个短暂存在的中间体几乎瞬间生成两个分子的3-磷酸甘油酸（3PGA）。
 Index

Organic chemistry concepts

Chemistry concepts

Reference
Karp
Ch 3
索引 有机化学概念 化学概念 参考 Karp 第3章
 
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