Which of the following is (are) characteristic of the (na+–k+)–atpase?
i. it binds na+ and k...
Which of the following is (are) characteristic of the (na+–k+)–atpase?
i. it binds na+ and k+ simultaneously prior to binding atp
ii. it is covalently modified by phosphorylation at an asp residue when na+ is present.
iii. transport of na+ and k+ occur in a 1: 1 ratio, thus maintaining a balanced gradient until opening of the gated portion of the channel.
iv. it is essential for excitation of nerve cells.
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