Erratum to: J Mol Evol (2012) 75:34–42 DOI 10.1007/s00239-012-9524-1

We regret to inform that the data presented in our published article (Satapathy et al. 2012) for the whole genome with respect to amino acid usage and NNC/NNU ratio is erroneous for the two bacteria Pseudomonas aeruginosa and Streptomyces coelicolor in Tables 1 and 2 of the article. The correct data under the “Whole genome” heading for the two bacteria are as follows:

In Table 1

  1. (i)

    The correct “Whole genome” data for the bacteria P. aeruginosa are 1859569, 3.56, 2.64, 4.17, 2.54.

  2. (ii)

    The correct “Whole genome” data for the bacteria S. coelicolor are 2560775, 2.65, 1.70, 2.86, 2.05.

In view of the above changes in Table 1, the amino acid usage data of these two bacteria given in the Supplementary Table 1 is no longer required and hence to be ignored.

In Table 2

  1. (i)

    The correct “Whole genome” data for the bacteria P. aeruginosa are 19.62, 6.06, 13.25, 3.82.

  2. (ii)

    The correct “Whole genome” data for the bacteria S. coelicolor are 61.99, 23.83, 46.16, 20.5.

In view of the above corrections in Table 1, what has been stated in the first paragraph of the result section in the article about the amino acid composition difference between the whole genomes and high expression genes in these two bacteria is no longer valid and hence to be ignored.

In view of the above corrections in Table 2, the NNC/NNU results for the two bacteria are in agreement with the earlier observation of Sharp et al. (2005). Hence what has been stated in the third paragraph in the discussion section of the article is no longer valid and hence to be ignored.

The changes in Tables 1 and 2 have no effect on the main findings of the analyses presented in the article. There is no change in the Title, Abstract, and Reference sections of the article.

Corrected tables with the relevant changes in the footnote are given below.

Table 1 Usage (in %) of phenylalanine (Phe), asparagine (Asn), isoleucine (Ile) and tyrosine (Tyr) amino acids
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Table 2 Transfer RNA gene number and synonymous codon usage in phenylalanine (Phe), asparagine (Asn), isoleucine (Ile) and tyrosine (Tyr) amino acids
Full size table