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. Author manuscript; available in PMC: 2019 Dec 20.
Published in final edited form as: Neurosci Lett. 2008 Apr 18;438(1):22–25. doi: 10.1016/j.neulet.2008.04.046

Figure 3. Concentrations of Kyn, Trp, Phe and Tyr in supernatants of IFN-treated U138.

Figure 3.

U138 human astroglioma cells were cultured to confluence and incubated for 48 hours in the absence or presence of rIFN-α/β or rIFN-γ; supernatants were collected after 48 hours (solid bars) of culture. Concentration of Kyn (A), Trp (B), Phe (C) and Tyr (D) in supernatants was measured by HPLC.