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. 2015 May 27;10:30. doi: 10.1186/s13062-015-0049-6

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© Könnyű et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Neighbourhoods used in the model. Neighbourhoods defined in the model. Dark grey sites constitute the replication neighbourhood of the empty site X (von Neumann neighbourhood in this case). Light grey sites are the metabolic neighbourhood of replicator R₁ (3×3 Moore neighbourhood). R_i (i = 1,2,3, 4) are replicators.