1Lecture 3: Function of proteins-most work in the cell are done by proteins, how do proteins work?1. Protein familyWhy different proteins have different functions?2. How do proteins work?-antibodies -enzymes3. How are proteins regulated in the cell-Proteins with similar sequence often have the similar structure and similar function -Proteins with the similar structure/function are grouped together as protein families, members of the same protein family are usually evolutionarily related-Different types of proteins:antibodies,enzymes, transcription factors, structural proteins,Transport proteins...1. Protein family
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