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. 2015 Sep 3;1:15010. doi: 10.1038/npjmgrav.2015.10

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Copyright © 2015 Macmillan Publishers Limited

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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At left are hexagonal by-pyramidal crystals of turnip yellow mosaic virus (TYMV). Note the flat faces of the crystals. At right are crystals of the same virus grown in microgravity. Because of diffusion limited transport of nutrient under μg conditions, the faces are strikingly creased and the edges indented. Crystals were grown in the Advanced Protein Crystallization Facility (APCF) on IML-2. IML-2, International Microgravity Laboratory-2.