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Ptc1
A general photo of the PTC[1]. | Download Scientific Diagram
![A general photo of the PTC[1]. | Download Scientific Diagram](https://www.researchgate.net/profile/Ali-Mohammed-Hayder/publication/337199744/figure/fig1/AS:824523762966531@1573593192336/A-general-photo-of-the-PTC1.jpg)