The sequence Lys-Asp-Glu-Leu (KDEL) serves as an ER retention signal for proteins by binding to KDEL receptors that

a. hold the proteins in the rough ER.
b. hold the proteins in the smooth ER.
c. hold the proteins in both smooth ER and rough ER and prevent their transport to the Golgi apparatus.
d. transport the proteins from the Golgi apparatus back to the ER.


Ans: d. transport the proteins from the Golgi apparatus back to the ER.

Biology & Microbiology

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