Citation:
MA Xinyu, WANG Zhipeng A., TIAN Jie, JIANG Zhenxiong, JIANG Hanjie, SUN He, ZHOU Qingxuan, WANG Xin. Discussion on the Definition of “Irreversible” Reactions and Its Related Concepts in Biochemistry[J]. University Chemistry,
;2019, 34(4): 77-83.
doi:
10.3866/PKU.DXHX201806016
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Some of the enzyme catalysis reactions were classified as irreversible in the biochemistry education and research. However, it is worth noting that the "irreversibility" defined in biochemistry is different from what is referred in physical chemistry, which often confuses students. Consequently, the essence of irreversibility and its derivative may mislead students to a fallacious understanding towards the reaction process of biochemical reactions. This manuscript anew discusses the precise definition of "irreversible" reactions in biochemistry based on the standard definition of "irreversibility" given in physical chemistry, and we further use several terms and examples including rate limiting step, rate limiting enzyme, and high-energy phosphate bond to identify and correct misunderstandings caused by inaccurate definition of irreversibility.
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Keywords:
- Enzyme catalysis,
- Reversible reaction,
- Chemical equilibrium
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