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On the microscopic origin of the cryoprotective effect in lysine solutions

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10.1039/c9cp06192d
 
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Henao, Andrés
Ruiz Tabbia, Guadalupe Natalia
Steinke, Nicola
Cerveny Murcia, Silvina
Macovez, RobertoMés informacióMés informacióMés informació
Busch, Sebastian
McLain, Sylvia E.
Lorenz, Christian D.
Pardo Soto, Luis CarlosMés informacióMés informacióMés informació
Document typeArticle
Defense date2020-04-07
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
The amino acid lysine has been shown to prevent water crystallization at low temperatures in saturated aqueous solutions [S. Cerveny and J. Swenson, Phys. Chem. Chem. Phys., 2014, 16, 22382–22390]. Here, we investigate two ratios of water and lysine (5.4 water molecules per lysine (saturated) and 11 water molecules per lysine) by means of the complementary use of computer simulations and neutron diffraction. By performing a detailed structural analysis we have been able to explain the anti-freeze properties of lysine by the strong hydrogen bond interactions of interstitial water molecules with lysine that prevent them from forming crystalline seeds. Additional water molecules beyond the 1 : 5.4 proportion are no longer tightly bonded to lysine and therefore are free to form crystals.
CitationHenao, A. [et al.]. On the microscopic origin of the cryoprotective effect in lysine solutions. "Physical chemistry chemical physics : PCCP", 7 Abril 2020, vol. 22, p. 6919-6927. 
URIhttp://hdl.handle.net/2117/340891
DOI10.1039/c9cp06192d
ISSN1463-9084
Publisher versionhttps://pubs.rsc.org/en/content/articlelanding/2020/CP/C9CP06192D#!divAbstract
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  • Departament de Física - Articles de revista [1.714]
  • GCM - Grup de Caracterització de Materials - Articles de revista [330]
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