This archive contains the source for figure 7 A1 A2 A3 B2 B3. In the directory B2_B3, the matlab script fixedIPump_withNa_JustHCO.m produces an eps file containing the figures found in 7B2 and 7B3. In the directory A1_A2_A3, the matlab scrip trjHCO.m produces an eps file which contains the figures found in 7A1, 7A2, and 7A3.