ABC-type ATPases that inhibit the effectiveness of antitumor drugs by transporting the drugs out of tumor cells are known as
A) multidrug resistance (MDR) transporters.
B) Na+-drug antiporters.
C) the cystic fibrosis transmembrane conductance regulator (CFTR).
D) porins.
E) None of the above; no such transporter has been identified in eukaryotes.
Answer: A
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