Protein A has a binding site for ligand X with a dissociation constant, Ka, of 3.0 × 10-' M. Protein B has a binding site for igand X with a Ka of 4.0 × 10-8 M. Calculate the Ka for each protein. Protein A Ka= M-! Protein B Kª= M-1 Which protein has greater affinity for ligand X? Why? Protein B has greater affinity because it has a lower Ka than Protein A. Protein A has greater affinity because it has a greater Ka than Protein B. Protein A has greater affinity because it has a greater Ka than Protein B. Protein B has greater affinity because it has a lower K than Protein A.

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Protein A has a binding site for ligand X with a dissociation constant, Ka, of 3.0 × 10-' M. Protein B has a binding site for
ligand X with a Ka of 4.0 x 10-8 M.
Calculate the K, for each protein.
Protein A Ka=
M-1
Protein B Ka=
M-1
Which protein has greater affinity for ligand X? Why?
Protein B has greater affinity because it has a lower Ka than Protein A.
Protein A has greater affinity because it has a greater Ka than Protein B.
Protein A has greater affinity because it has a greater Ka than Protein B.
O Protein B has greater affinity because it has a lower Ka than Protein A.
Transcribed Image Text:Protein A has a binding site for ligand X with a dissociation constant, Ka, of 3.0 × 10-' M. Protein B has a binding site for ligand X with a Ka of 4.0 x 10-8 M. Calculate the K, for each protein. Protein A Ka= M-1 Protein B Ka= M-1 Which protein has greater affinity for ligand X? Why? Protein B has greater affinity because it has a lower Ka than Protein A. Protein A has greater affinity because it has a greater Ka than Protein B. Protein A has greater affinity because it has a greater Ka than Protein B. O Protein B has greater affinity because it has a lower Ka than Protein A.
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