Working with Proteins

Welcome to Let's Learn Plants! In this tutorial video, "Working with Proteins" we explore the essential techniques used to isolate, purify, and analyze the proteome—the dynamic and ever-changing set of proteins expressed by a cell or organism. The video guides you through the complete laboratory workflow for working with proteins, including: Extraction and Lysis: Understanding how to break open cells and use centrifugation to separate soluble proteins from cellular debris. Plant-Specific Techniques: Tips for handling plant tissues, such as using liquid nitrogen to deactivate proteases and adding inhibitors to prevent damage from phenols. Initial Purification: A look at salting out to precipitate specific proteins and dialysis to remove small molecule contaminants like salts or detergents. Advanced Chromatography: In-depth explanations of the four primary separation methods: Gel Filtration (Size Exclusion): Separating proteins based on their molecular size and shape. Ion Exchange: Using electrical charge and buffer pH to isolate specific molecules. Affinity Chromatography: Exploiting high biological specificity, such as using IMAC for His-tagged proteins. HPLC: Utilizing high-pressure systems for superior resolution and fast analytical separation.