試題詳解

1. Arginine has the following pKa values: pK1 = 2.17, pK2 = 9.04, pKR = 12.48 Give the net charge of arginine at pH = 4 and 7
(A) +1 and +1
(B) 0 and 0
(C) 0 and +1
(D) +2 and +1