AAstat {seqinr} | R Documentation

## To Get Some Protein Statistics

### Description

cd It gives simple protein sequence information including the number of residues, the percentage of each physico-chemical class of amino acid and the theoretical isoelectric point.

### Usage

    AAstat(seq, plot = TRUE)

### Arguments

`seq` | a protein sequence as a vector of chars
`plot` | if `TRUE`, it plots a histogram of the presence of residues with the physico-chemical properties: Tiny, Small, Aliphatic, Aromatic, Non-polar, Polar, Charged, Positive, Negative

### Value

If plot is `TRUE`, it draws the histogram as described with the top. It returns a list with the following components:

`Compo` | A factor giving the number of each residues.
`Prop` | A list giving the percentage of each physico-chemical class of amino acid.
`Pi` | The theoretical isoelectric point

### Author(s)

D. Charif

### References

`citation("seqinr")`

### See Also

`computePI`, `SEQINR.UTIL`, `SeqFastaAA`

### Examples

      ss = read.fasta(File=system.file("sequences/seqAA.fasta",package = "seqinr"),seqtype="AA")
      AAstat(ss[[1]])

[Package seqinr version 1.0-4 Index]