Protein Receptors and Signaling Pathways

This lecture explores the interaction between proteins, focusing on receptors and ligands. It delves into the structure of transmembrane proteins, the concept of signal transduction, and the role of neurotransmitters like dopamine. The discussion extends to the use of agonists and antagonists in pharmacology, with examples such as nicotine and curare. The lecture also touches on the impact of caffeine on adenosine receptors and the importance of protein-receptor affinity in targeting specific cells. The session concludes with a brief overview of competitive inhibition and the complexities of receptor interactions in biological systems.