6N4Y:
reference: Structural insights into the activation of metabotropic glutamate receptors., Koehl A, Hu H, Feng D, Sun B, Zhang Y, Robertson MJ, Chu M, Kobilka TS, Laermans T, Steyaert J, Tarrasch J, Dutta S, Fonseca R, Weis WI, Mathiesen JM, Skiniotis G, Kobilka BK, Nature. 2019 Feb;566(7742):79-84. doi: 10.1038/s41586-019-0881-4. Epub 2019 Jan, 23. PMID: 30675062

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