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【单选题】
蛋白激酶A具有4个亚基，包括2个调节亚基R和2个催化亚基C，能够结合cAMP的亚基类型及每个亚基结合cAMP的数目是：A.
催化亚基C，每个催化亚基C结合1个cAMP
B.
调节亚基R，每个亚基R结合1个cAMP
C.
催化亚基C，每个催化亚基C结合2个cAMP
D.
调节亚基R，每个调节亚基R结合2个cAMP
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A.
will be made use of giving
B.
will make use of to give
C.
will be used of to give
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will be made use of to give
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senior
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equal
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A.
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giving
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gave
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to be given
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will be used
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will make use of
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will be used of
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