If You Want to Determine What Other Proteins Might Be $\beta$

question 29

Multiple Choice

If you want to determine what other proteins might be interacting with the protein you have been studying, what type of fusion tag would you add to your protein to aid in purification of both the protein you have been studying and the proteins interacting with it?

• A) a green fluorescent protein fusion tag
• B) a tandem affinity purification tag
• C) a maltose-binding protein tag
• D) an epitope tag
• E) a \(\beta\)-galactosidase tag

---

Definitions:

Avoidable Cost

An expense that can be eliminated if a particular decision is made, not incurred if a specific activity is discontinued.

Fixed Production Cost

The portion of total production costs that does not change with the level of output, including costs such as rent, salaries, and insurance.

Vertical Integration

The involvement by a company in more than one of the activities in the entire value chain from development through production, distribution, sales, and after-sales service.

Economies of Scale

The cost advantage that arises with increased output of a product, as the fixed costs are spread over more units of production.