#  pI = 2.40
#  pH 	   chg
  0.00	  1.32
  0.50	  1.08
  1.00	  0.88
  1.50	  0.62
  2.00	  0.28
  2.50	 -0.07
  3.00	 -0.41
  3.50	 -0.72
  4.00	 -0.90
  4.50	 -0.98
  5.00	 -1.04
  5.50	 -1.15
  6.00	 -1.37
  6.50	 -1.65
  7.00	 -1.86
  7.50	 -1.99
  8.00	 -2.10
  8.50	 -2.30
  9.00	 -2.71
  9.50	 -3.24
 10.00	 -3.66
 10.50	 -3.88
 11.00	 -3.96
 11.50	 -3.99
 12.00	 -4.00
 12.50	 -4.00
 13.00	 -4.00
 13.50	 -4.00
 14.00	 -4.00