https://www.khanacademy.org/science/telangana-class-12-chemistry/x50160c6c142df488:biomolecules/x50160c6c142df488:proteins/v/isoelectric-point-and-zwitterions 2021-05-25T21:59:57Z Isoelectric point and zwitterions The isoelectric point of an amino acid is the pH at which the amino acid has a neutral charge. You will learn how to calculate the isoelectric point, and the effects of pH on the amino acid's overall charge. We will also discuss zwitterions, or the forms of amino acids that dominate at the isoelectric point. By Tracy Kovach. Tracy Kim Kovach video https://cdn.kastatic.org/googleusercontent/hwc9eKUX8kjrQEdpc2Vy57CnTVz4QCzGpu4PYowYxeLdZetc6DKJ3e4zT6wC17GWmBg9I6zUjeh7oX5uwI8krl8 Isoelectric point and zwitterions The isoelectric point of an amino acid is the pH at which the amino acid has a neutral charge. You will learn how to calculate the isoelectric point, and the effects of pH on the amino acid's overall charge. We will also discuss zwitterions, or the forms of amino acids that dominate at the isoelectric point. By Tracy Kovach. https://cdn.kastatic.org/ka-youtube-converted/42llTiRn-b8.mp4/42llTiRn-b8.mp4 325 Amino acids and peptides https://www.khanacademy.org/science/telangana-class-12-chemistry/x50160c6c142df488:biomolecules/x50160c6c142df488:proteins/v/peptide-bond-formation-and-cleavage 2023-08-11T20:27:11.407186761Z Peptide bonds: Formation and cleavage Peptide bonds are the vital links that connect amino acids to form polypeptide chains, which fold into functional proteins. These bonds are formed through a nucleophilic addition-elimination reaction and are characterized by their rigidity and planarity, thanks to resonance delocalization. The process of breaking these bonds is called hydrolysis, which can be nonspecific with strong acids or specific with proteolytic enzymes. By Tracy Kovach. Tracy Kim Kovach video https://cdn.kastatic.org/googleusercontent/DPDltlvVPiC4ObaQqHJSfb3_jt9nthyOR_F4c344csZ3FN59dwCBAXABFHrZOyOSaBalpxCDFK5WzidAoZAvIBl3 Peptide bonds: Formation and cleavage Peptide bonds are the vital links that connect amino acids to form polypeptide chains, which fold into functional proteins. These bonds are formed through a nucleophilic addition-elimination reaction and are characterized by their rigidity and planarity, thanks to resonance delocalization. The process of breaking these bonds is called hydrolysis, which can be nonspecific with strong acids or specific with proteolytic enzymes. By Tracy Kovach. https://cdn.kastatic.org/ka-youtube-converted/pmQuNRHJMw4.mp4/pmQuNRHJMw4.mp4 431 Amino acids and peptides https://www.khanacademy.org/science/biology/macromolecules/proteins-and-amino-acids/v/peptide-bond-formation 2021-03-18T10:33:23Z Peptide bond formation How amino acids form peptide bonds (peptide linkages) through a condensation reaction (dehydration synthesis). video https://cdn.kastatic.org/googleusercontent/NTglMUp85MtJs8VhqDdR7MKpsF0ZnK9NxwB7LFjiw6C_nQTgU_OJ0KigMM9DMep7K38LdrGRspQQJbp_SUlwqEqZNQ Peptide bond formation How amino acids form peptide bonds (peptide linkages) through a condensation reaction (dehydration synthesis). https://cdn.kastatic.org/ka-youtube-converted/nv2kfBFkv4s.mp4/nv2kfBFkv4s.mp4 506 Amino acids and peptides https://www.khanacademy.org/science/biology/macromolecules/proteins-and-amino-acids/a/introduction-to-proteins-and-amino-acids 2021-04-29T07:56:49Z Introduction to proteins and amino acids Different types of proteins. The structure and properties of amino acids. Formation of peptide bonds. article https://www.khanacademy.org/science/grade-12-chemistry-snc-aligned/x7a43e770fc9e15cf:nitrogen-compounds/x7a43e770fc9e15cf:amino-acids-and-peptides/a/isoelectric-focusing 2024-12-17T22:11:00.164662631Z Isoelectric focusing This articles goes over the basics of isoelectric focusing and the separation of molecules. article