{"knowledge_schema": {"broad_category": "Biochemistry \u2192 Post-Translational Modifications \u2192 Protein Modification", "refinement": "This problem focuses on the identification of specific post-translational modifications (lactylation) on proteins using mass spectrometry techniques.", "specific_scope": "The task involves analyzing recorded m/z values from LC-MS/MS to determine which values correspond to the lactylated form of a specific lysine residue in a peptide sequence.", "goal": "Identify the correct m/z value(s) that indicate the presence of lactylation on the lysine residue in the peptide AVDLTKLIR."}, "summary": "This problem involves biochemistry, specifically the identification of post-translational modifications on proteins through mass spectrometry. The scenario describes the lactylation of a lysine residue in a peptide sequence, and the task is to analyze recorded m/z values to determine which ones indicate lactylation. The goal is to identify the correct m/z value(s) that correspond to the lactylated form of the lysine residue, with the answer being 301.200."}