(来学网)天门冬氨酸的pK1=2.09、pK2=9.82、pKR=3.86,其pI是
  • A.
    (来学网)7.73
  • B.
    (来学网)6.84
  • C.
    (来学网)5.96
  • D.
    (来学网)5.955
  • E.
    (来学网)2.98