Mean zscore on 242 complete bacterial chromosomes

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Description

This dataset contains the mean zscores as computed on all intergenic sequences (intergenic) and on all CDS (coding) from 242 complete bacterial chromosomes (as retrieved from Genome Reviews database on June 16, 2005).

Usage

1

Format

List of two dataframes of 242 chromosomes and 16 dinucleotides: one for intergenic, one for coding sequences.

intergenic

the mean of zscore computed with the base model on each intergenic sequence

coding

the mean of zscore computed with the codon model on each coding sequence

References

Palmeira, L., Gu├ęguen, L. and Lobry JR. (2006) UV-targeted dinucleotides are not depleted in light-exposed Prokaryotic genomes. Molecular Biology and Evolution, 23:2214-2219.
http://mbe.oxfordjournals.org/cgi/reprint/23/11/2214

citation("seqinr")

See Also

zscore

Examples

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data(dinucl)
par(mfrow = c(2, 2), mar = c(4,4,0.5,0.5)+0.1)
myplot <- function(x){
  plot(dinucl$intergenic[, x], dinucl$coding[, x],
  xlab = "intergenic", ylab = "coding", 
  las = 1, ylim = c(-6, 4), 
  xlim = c(-3, 3), cex = 0)
  rect(-10,-10,-1.96,10,col="yellow", border = "yellow")
  rect(1.96,-10,10,10,col="yellow", border = "yellow")
  rect(-10,-10,10,-1.96,col="yellow", border = "yellow")
  rect(-10,1.96,10,10,col="yellow", border = "yellow")
  abline(v=0,lty=3)
  abline(h=0,lty=3)
  abline(h=-1.96,lty=2)
  abline(h=+1.96,lty=2)
  abline(v=-1.96,lty=2)
  abline(v=+1.96,lty=2)
  points(dinucl$intergenic[, x], dinucl$coding[, x], pch = 21,
  col = rgb(.1,.1,.1,.5), bg = rgb(.5,.5,.5,.5))
  legend("bottomright", inset = 0.02,
   legend = paste(substr(x,1,1), "p",
    substr(x,2,2), " bias", sep = ""), cex = 1.25, bg = "white")
  box()
}
myplot("CT")
myplot("TC")
myplot("CC")
myplot("TT")

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