题目某氨基酸在pH为8的水溶液中为阴离子,该氨基酸pI是A. 8B. 2.9C. 10.8D. 9.7E. 8.5某氨基酸在pH为8的水溶液中为阴离子,该氨基酸pI是A. 8B. 2.9C. 10.8D. 9.7E. 8.5题目解答答案B. 2.9