Table 2.

More Parameters^*

Membrane permeability	CO2	34.20 cm/sec	calculated, assuming that the diffusion coefficient in the membrane is the same as an equivalent thickness of water.
	H2CO3	0	assumed
	HCO3−	0	assumed
	H+	0	assumed
	HA1	0	assumed
	${\text{A}}_1^{-}$	0	assumed
Temperature		22°C	(room temperature)
Solubility	CO2	0.0434 mM/mmHg	calculated**

^*In the computer code, we represent zero as 1 × 10⁻²⁰ cm/sec

^**See supplementary data for an explanation on how we calculated this value.