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. Author manuscript; available in PMC: 2014 Jul 14.
Published in final edited form as: Science. 2013 Sep 26;342(6156):347–351. doi: 10.1126/science.1243192

Fig. 1. Diurnal cycling of TBA metabolites.

Fig. 1

(A) Day-night cycling of 17α-TBOH (red), 12-hydroxy-17α-TBOH (gray), and 5-hydroxy-17α-TBOH (black) at pH 7, 25°C. Data for 17α-TBOH are presented as aqueous concentration (left axis), whereas peak areas from spectrophotometric absorbance [wavelength (λ) = 350 nm for 17α-TBOH; λ = 254 nm for photoproducts] are also presented (right axis). (B) Corresponding data for 17β-TBOH and TBO, where symbols with a center dot indicate values below our detection limit. In these cases, data points correspond to this limit (~3 nM) for 17β-TBOH and TBO. Ct/C0, time-dependent concentration normalized to initial concentration; h, hours; A.U., arbitrary units.