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. 2007 Jun 5;7:85. doi: 10.1186/1471-2148-7-85

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Copyright © 2007 Marin et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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AT content bias in rbcL and complete carboxysomal operon sequences in Paulinella and Prochlorococcus. Whereas the AT-content in codon positions 1 + 2 in the rbcL gene is balanced across Paulinella and 17 free-living α-cyanobacteria (A), the third codon position displays a sharply elevated AT-content in Paulinella as well as Prochlorococcus strains (B). The AT-content integrated over the complete carboxysomal operon (from csoS1 to pepB) including intergenic spacer regions shows a similar bias, although less pronounced (C).