This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Which of the following is a propey of amino acids at isoelectric pH? \nSelect and explain. \nA. Maximum buffering action, B. Maximum precipitability, C. Maximum solubulity, D. Mobility in electric field', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The propeies of an amino acid at isoelectric pH are as follows: Maximum precipitability Minimum buffering action (note: maximum buffering action is when the pH=pKa, and not at isoelectric pH) Minimum solubility No mobility in an electric field Reference Reference: Harpers illustrated biochemistry 30th edition', 'role': 'assistant'}]