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. Author manuscript; available in PMC: 2015 Jul 29.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2013 Dec 16;0:186–191. doi: 10.1016/j.jchromb.2013.12.010

Fig. 4.

Fig. 4

(A) Concentration of Exendin[9-39] in plasma collected from three subjects at time points t= 0, 60, 120, 180, 240, 360, 420, 480 and 540 min. (B) Sample reanalysis after a twelve month storage period at −80 °C.