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. 2018 May 21;16(5):e2006192. doi: 10.1371/journal.pbio.2006192

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© 2018 Stöppler et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 2 — (A) The protein crystallized as a dimer composed of two β2m (dark grey and green) and two α-chain (light grey and blue) molecules. (B) At the interface of β2m and the α-chain, UCB-FcRn-303 (grey) occupies a binding pocket with Glycine, Cysteine, hydrophobic (Leucine), charged (Histidine, Aspartate), and polar uncharged (Serine, Glutamine) residues. β2m, β2-microglobulin; FcRn, neonatal Fc receptor; FcRn_ECD, extracellular domain of the neonatal Fc receptor.