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. Author manuscript; available in PMC: 2009 Dec 1.
Published in final edited form as: Mol Genet Metab. 2009 Jul 14;98(4):325–330. doi: 10.1016/j.ymgme.2009.07.010

Figure 1.

Figure 1

Isotopic abundance (atom % excess) in 13CO2 in expired air in healthy adults who received an infusion of NaH13CO3 (0.089 mmol/kg/hr; 98 atom % excess) for a period of 300 minutes. The solid horizontal line denotes the mean isotopic abundance from 10 to 300 minutes. During the initial 10 minutes of the experiment each subject also received a priming dose (0.083 mmol/kg) of the labeled bicarbonate. Breath was taken at the times indicated by having each individual exhale into a plastic collection device fitted with a one-way valve. At 90 minutes each individual received an oral dose of NCG (100 mg/kg).