The phrase "affects the affinity of" is correct and usable in written English.
It can be used in contexts related to chemistry, biology, or any field discussing interactions between molecules or entities.
Example: "The presence of a competitive inhibitor affects the affinity of the enzyme for its substrate."
Alternatives: "influences the binding strength of" or "modifies the attraction of".
Conversely, binding of these substances to hemoglobin affects the affinity of hemoglobin for oxygen.
The presence of these gp120 dimers, generated in a widely used gp120 expression system, affects the affinity of gp120 for CD4-induced ligands, as evaluated by surface plasmon resonance.
Thus, we can assume the morphology of the ZnO nanocrystals must be an important fact that affects the affinity of phenol compounds to HRP.
Furthermore, as reported above for IAA, the deprotonation of the carboxylic acid on 2-NAA and 2,4-D significantly affects the affinity of these molecules toward CB[7].
The results of this study suggest that the presence of the charged residue significantly affects the affinity of test substrates even though it does not substantially contribute to the specificity to each BCRP polymorph.
Clearly the number of mismatches affects the affinity of the probe: PM probes have the smallest K values, single-MM probes have slightly larger K values, the difference is statistically significant (P<0.05, one-sided Wilcoxon test).
In our kinetic experiments, this deletion did not affect the affinity of protoporphyrinogen IX nor the FAD content, but decreased the catalytic efficiency of the enzyme.
A single point mutation at position 131 replace an arginine (R) with a histidine (H) that can affect the affinity of the receptor for human IgG subclasses.
Based on structure comparisons, we designed a set of talin F3 mutations that selectively affected the affinity of talin for its targets, as determined by stopped-flow fluorescence measurements.
This result implies that CC-EO and trans-cinnamaldehyde affected the affinity of the enzyme for L-DOPA but did not bind at the active site (Webb 1963).
Since the thiol group is situated in the concave side of the protein, this modification is unlikely to affect the convex side of the protein which contains the PS-binding surface, and therefore, unlikely to affect the affinity of the protein for apoptotic cells.
