1. Digestion of Proteins скачать в хорошем качестве

1. Digestion of Proteins

This video is the part of playlist: https:// In this video tutorial, I am discussing about Digestion of Proteins Link to download PDF notes of this video: https://drive.google.com/file/d/1So6o... ************************************** Link of Next video:    • 2. Absorption of proteins and amino acids|...   Link of previous video: [This is the 1st video of playlist, so no any previous video] ************************************** Alternative Titles/tags protein digestion and absorption, protein digestion and absorption biochemistry, protein digestion and absorption physiology, protein digestion in small intestine, protein digestion in stomach, protein digestion animation, digestion absorption and metabolism of protein, how to improve protein digestion and absorption, protein digestion by pepsin experiment, protein absorption biochemistry, dietary protein digestion biochemistry, protein digestion enzymes, protein digestion explained, enzymes for protein digestion, explain the role of pepsin in protein digestion, protein digestion in git, gastric digestion of protein, state the role of pancreatic juice in digestion of protein, protein digest kaise kare, protein ka digestion , ************************************** Index: 00:00 – Introduction 00:12 – Stomoch : role in protein digestion 11:53 – Duodenum : role in protein digestion 21:30 – Small intestine: role in protein digestion Protein Digestion Overview 1. Introduction Protein digestion starts in the stomach (not in the mouth). The stomach contains gastric parietal cells and chief cells. 2. Stomach: Role in Protein Digestion Parietal cells secrete hydrochloric acid (HCl): Provides a pH of ~2 (acidic environment). Kills fungi and bacteria (antiseptic function). Denatures proteins for easier digestion. Chief cells secrete pepsinogen (inactive form of pepsin): Pepsinogen is activated into pepsin by HCl. Pepsin is an endopeptidase that breaks internal peptide bonds. Targets aromatic amino acids (phenylalanine, tyrosine, tryptophan) and methionine. In infants, the stomach secretes rennin, which helps digest milk protein (casein). 3. Duodenum: Role in Protein Digestion Acidic chyme enters the duodenum, stimulating hormone release: Secretin stimulates the pancreas to release bicarbonate ions (neutralizes chyme, pH ~8). Cholecystokinin (CCK) stimulates pancreatic enzyme secretion. Pancreatic juice contains digestive enzymes: Endopeptidases: Trypsinogen, Chymotrypsinogen, Proelastase. Exopeptidases: Procarboxypeptidase A & B. Enzyme Activation: Enterokinase (from duodenal mucosa) activates trypsinogen → trypsin. Trypsin activates other zymogens: Chymotrypsinogen → Chymotrypsin. Proelastase → Elastase. Procarboxypeptidase A & B → Carboxypeptidase A & B. Function of Pancreatic Enzymes: Trypsin: Cleaves after basic amino acids (lysine, arginine). Chymotrypsin: Cleaves after aromatic amino acids. Elastase: Cleaves near small aliphatic amino acids. Carboxypeptidases: Remove amino acids from the carboxyl end. These enzymes continue digestion, breaking proteins into peptides and free amino acids for absorption. #biochemistry #neet #mbbs #csirnet #usmle #metabolism #glycogen Note: Subtitles edited