A researcher wants to introduce the human gene encoding tissue plasminogen activator (used to dissolve blood clots) into a mammal so that the protein will be secreted into the milk of the mammary gland. What is required for the researcher's success?
A. The gene should be placed a considerable distance away from the promoter of a gene that is expressed in mammary cells.
B. The gene should be placed next to the promoter of a gene that is expressed in mammary cells.
C. The gene should be placed a considerable distance away from the promoter of a gene that is expressed in multiple types of cells.
D. The gene should be placed next to the promoter of a gene that is expressed in multiple types of cells.
E. The gene should be inserted in place of the promoter of a gene that is expressed in multiple types of cells.
B. The gene should be placed next to the promoter of a gene that is expressed in mammary cells.
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What will be an ideal response?
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