#  pI = 5.49
#  pH 	   chg
  0.00	  1.00
  0.50	  1.00
  1.00	  1.00
  1.50	  0.99
  2.00	  0.97
  2.50	  0.92
  3.00	  0.78
  3.50	  0.52
  4.00	  0.26
  4.50	  0.10
  5.00	  0.03
  5.50	 -0.00
  6.00	 -0.03
  6.50	 -0.10
  7.00	 -0.27
  7.50	 -0.54
  8.00	 -0.78
  8.50	 -0.92
  9.00	 -0.97
  9.50	 -0.99
 10.00	 -1.01
 10.50	 -1.03
 11.00	 -1.10
 11.50	 -1.26
 12.00	 -1.52
 12.50	 -1.78
 13.00	 -1.95
 13.50	 -2.07
 14.00	 -2.24