5A4R:
reference: Structural insights into the MMACHC-MMADHC protein complex involved in vitamin B12 trafficking., Froese DS, Kopec J, Fitzpatrick F, Schuller M, McCorvie TJ, Chalk R, Plessl T, Fettelschoss V, Fowler B, Baumgartner MR, Yue WW, J Biol Chem. 2015 Oct 19. pii: jbc.M115.683268. PMID: 26483544

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