Biochem 3: Amino Acids, Peptides, and Proteins

Every mystery has its characters. In biochemistry, they are not suspects or witnesses, but amino acids — small, deceptively simple molecules whose personalities determine everything that follows.In this episode, Medlock Holmes begins the careful task of identification. We explore amino acids not as a list to memorise, but as a diverse cast with distinct chemical behaviours: charged, polar, hydrophobic, rigid, flexible. From these building blocks emerge peptides and proteins — the workers, messengers, scaffolds, and catalysts of the cell.Using Lehninger’s emphasis on chemical logic and Harper’s clinically oriented treatment of amino acids and peptides, this episode shows how side chains dictate interactions, how peptide bonds encode directionality, and why even a single substitution can alter structure, function, or fate.This is where biochemistry starts to feel tangible. You begin to recognise patterns, anticipate behaviour, and understand why proteins behave less like static objects and more like responsive agents within a living system.Medlock does not rush this step. You cannot solve a case if you do not know who is in the room.Key Topics Explored* The chemical structure and classification of amino acids* Side chains as determinants of behaviour and interaction* Peptide bonds and molecular directionality* Why primary structure matters clinically* How small molecular differences lead to large biological effects This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit drmanaankarray.substack.com/subscribe