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Foundation Sciences · Biochemistry
Cofactors and Coenzymes
Metals and small molecules that enable enzymatic catalysis; mostly vitamin-derived.
📌 Learning Objectives
- Describe the key principles of cofactors and coenzymes.
- Explain the clinical relevance of cofactors and coenzymes.
- Recognise common conditions linked to cofactors and coenzymes in MLA-style scenarios.
📋 Overview
Metals and small molecules that enable enzymatic catalysis; mostly vitamin-derived. This topic integrates with pathology, pharmacology and clinical medicine and is frequently tested in UK medical school exams and the MLA.
🔬 Basic Science
Metals and small molecules that enable enzymatic catalysis; mostly vitamin-derived. Detailed mechanisms, regulation and molecular interactions underpin both normal physiology and disease.
🏥 Clinical Relevance
Deficiency syndromes mirror enzyme failure; chelation in Wilson disease.
🧪 Investigations
Relevant laboratory tests, imaging or histological examination are used as appropriate to the clinical context.
💊 Management
Management is condition-specific; principles include addressing the underlying biochemical/structural derangement, supportive care and targeted therapy where available.
Revision Resources – expand the sections below for high-yield notes, exam pearls, key facts and further reading.
MLA High-Yield Notes & Quick Revision ⌄
High-yield topic for the UK MLA — frequently appears in SBA questions linking biochemistry concepts to clinical presentations and management decisions.
Applying biomedical science to clinical practice
Diagnosis and investigation
Pathophysiology of common conditions
- Metals and small molecules that enable enzymatic catalysis
- mostly vitamin-derived.
Exam Pearls ⌄
⭐ High Yield
NAD/NADP from niacin; FAD/FMN from riboflavin
TPP, PLP, biotin, CoA, THF
Metals: Zn (carbonic anhydrase), Mg (kinases), Fe (cytochromes), Cu (cytochrome c oxidase)
💡 Clinical Pearl
: Deficiency syndromes mirror enzyme failure; chelation in Wilson disease.
⚠️ Exam Tip — Common Mistakes
Confusing cofactors and coenzymes with related but distinct mechanisms.
Memorising pathways without linking to clinical disease.
Key Facts ⌄
NAD/NADP from niacin; FAD/FMN from riboflavin
TPP, PLP, biotin, CoA, THF
Metals: Zn (carbonic anhydrase), Mg (kinases), Fe (cytochromes), Cu (cytochrome c oxidase)
References ⌄
- BMJ Best Practice
- Robbins Basic Pathology
- Lippincott Illustrated Reviews: Biochemistry
- Wheater's Functional Histology
- NICE guidance where applicable.
Further Resources
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