Question: what would be a typical regulatory system in a metabolic pathway
[{'answer': 'the stoichiometric reaction model', 'provenance': [{'wikipedia_id': '20941', 'title': 'Metabolic pathway', 'start_paragraph_id': 27, 'start_character': 101, 'end_paragraph_id': 27, 'end_character': 134, 'bleu_score': 1.0, 'section': 'Section::::Regulation.\n'}]}, {'answer': 'the utilization rate of metabolites', 'provenance': [{'wikipedia_id': '20941', 'title': 'Metabolic pathway', 'start_paragraph_id': 27, 'start_character': 136, 'end_paragraph_id': 27, 'end_character': 171, 'bleu_score': 1.0, 'section': 'Section::::Regulation.\n'}]}, {'answer': 'the translocation pace of molecules across the lipid bilayer'}, {'provenance': [{'wikipedia_id': '20941', 'title': 'Metabolic pathway', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 613, 'bleu_score': 0.909913626309065, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 320617702454034161}, 'section': 'Section::::Regulation.\n'}]}]