Tryptophan & Methionine Metabolism | Biochemistry | Niacin, Serotonin & Homocystinuria | MBBS

Tryptophan & Methionine Metabolism | Biochemistry | MBBS 📚 Tryptophan & Methionine Metabolism – Complete Biochemistry Lecture In this lecture, we will understand the metabolism of Tryptophan and Methionine in a simple, conceptual, and exam-oriented way. 🔹 Topics Covered: Tryptophan Metabolism • Tryptophan degradation • Tryptophan → Serotonin • Serotonin synthesis • Melatonin formation • Tryptophan → Niacin (Vitamin B3) • Kynurenine pathway • Hartnup disease • Carcinoid syndrome • Pellagra and niacin deficiency Methionine Metabolism • Methionine → SAM • S-adenosylmethionine (SAM) as a methyl donor • Formation of Homocysteine • Remethylation pathway • Transsulfuration pathway • Role of Folate & Vitamin B12 • Role of Vitamin B6 • Cystathionine and Cysteine formation • Homocystinuria • Important enzymes and biochemical defects • Clinical significance & important MBBS exam points 🎓 Useful For: MBBS | BDS | Nursing | Biochemistry | Medical Students | USMLE | Medical Exams 📖 Reference: Satyanarayana Biochemistry / Standard MBBS Biochemistry Concepts 👨‍⚕️ LEO MBBS LECTURES Dr MAQBOOL AHMED (MBBS) #TryptophanMetabolism #MethionineMetabolism #Biochemistry #Homocystinuria #Serotonin #Niacin #SAM #HartnupDisease #Pellagra #MBBS #MBBSBiochemistry #LEOMBBSLECTURES tryptophan metabolism methionine metabolism tryptophan and methionine metabolism tryptophan metabolism biochemistry methionine metabolism biochemistry tryptophan methionine metabolism MBBS tryptophan to serotonin serotonin synthesis tryptophan to niacin niacin synthesis from tryptophan kynurenine pathway Hartnup disease Hartnup disease biochemistry carcinoid syndrome pellagra biochemistry methionine to SAM S adenosyl methionine SAM methyl donor homocysteine metabolism homocystinuria homocystinuria biochemistry homocystinuria MBBS transsulfuration pathway remethylation pathway cystathionine synthesis cysteine synthesis vitamin B12 folate homocysteine vitamin B6 transsulfuration amino acid metabolism amino acid metabolism biochemistry amino acid metabolism MBBS biochemistry MBBS MBBS biochemistry lecture Satyanarayana biochemistry medical biochemistry USMLE biochemistry biochemistry exam preparation LEO MBBS LECTURES Dr Maqbool Ahmed