Britannica
Sources used in this answer
Why must results from purified enzymes be checked in whole cells or organisms?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
Biochemistry
In biochemistry, researchers study the chemical substances and processes that occur in living organisms and cells. In particular, various processes by which cells gain energy, such as epinephrine-stimulated cAMP synthesis, have been deduced through the study of biochemistry.
Biochemists study purified enzymes to understand the specific chemical steps and mechanisms of a metabolic pathway. However, these isolated systems only approximate biological reality. It is essential to check these results in whole cells or organisms for several critical reasons:
- Complex Regulation: Metabolic pathways are governed by fine and coarse controls, such as allosteric regulation and the synthesis of pacemaker enzymes, which may not be fully replicated in a purified system.12
- Cellular Environment: Enzymes in a cell are often compartmentalized within specific organelles or associated with membranes, which can influence their activity and interactions.13
- Systemic Coordination: The cell coordinates various metabolic routes through feedback mechanisms and the influence of hormones or other chemical signals that affect the internal environment.143
- Biological Context: Complex processes, particularly those involving differentiation and development, require the integrated environment of a living system to be accurately understood.1
Ultimately, while purified systems provide necessary quantitative detail, the study of the whole cell is required to identify the full range of influences and controls that govern metabolic function.1