Bohr Effect
The Bohr Effect refers to the physiological phenomenon where an increase in carbon dioxide concentration or a decrease in pH (more acidic environment) reduces the affinity of hemoglobin for oxygen.
This effect facilitates oxygen release in metabolically active tissues where CO2 levels are high and pH is low, ensuring efficient oxygen delivery.
In simple terms: more CO2 → lower pH → hemoglobin releases oxygen more readily.
Role of Cytochrome P450
Cytochrome P450 enzymes are a large family of heme‑containing proteins found mainly in the liver. They play a crucial role in the metabolism of drugs, toxins, and endogenous compounds.
- They catalyze oxidation reactions (hydroxylation, epoxidation, dealkylation).
- Help in detoxification of xenobiotics and pollutants.
- Participate in biosynthesis of steroid hormones, cholesterol, and vitamin D.
- Provide metabolic clearance of pharmaceuticals, influencing drug efficacy and toxicity.
Example: Cytochrome P450 enzymes metabolize paracetamol, caffeine, and many other common drugs.
Conclusion
The Bohr Effect explains oxygen delivery dynamics in tissues, while Cytochrome P450 enzymes highlight the body's biochemical adaptability in handling drugs and toxins. Together, they demonstrate critical physiological and biochemical mechanisms essential for survival.
What is Bohr effect? Explain the role of Cytochrome P450.
Asked in UPSC 2024