{"knowledge_schema": {"broad_category": "Biochemistry \u2192 Protein Interactions \u2192 Post-Translational Modifications", "refinement": "This problem focuses on understanding the effects of phosphorylation on protein-protein interactions and the structural states of proteins based on experimental data.", "specific_scope": "The analysis involves interpreting SEC-MALS results from multiple experiments to deduce the interactions and affinities between proteins A, B, C, and D, particularly in relation to phosphorylation and dephosphorylation effects.", "goal": "Identify the most accurate statement regarding the interactions and affinities of the proteins based on the experimental results."}, "summary": "This problem involves analyzing protein-protein interactions and the effects of phosphorylation on these interactions using SEC-MALS data from multiple experiments. The goal is to determine which statement accurately reflects the relationships and affinities between the proteins based on their observed masses and the effects of post-translational modifications. The analysis requires careful consideration of the experimental results to deduce the correct answer from the provided candidates."}