aaa {seqinr} | R Documentation

## Converts amino-acid one-letter code into the three-letter one

### Description

This is a vectorized function to convert one-letter amino-acid code into the three-letter one, for instance "A" into "Ala".

### Usage

    aaa(aa)

### Arguments

`aa` | A vector of single characters

### Details

Allowed character values for `aa` are *ACDEFGHIKLMNPQRSTVWY. All other values will generate a warning and return NA.

### Value

A vector of char string. All strings are 3 chars long, run example(aaa) to see them.

### Author(s)

J.R. Lobry

### References

The IUPAC one-letter code for aminoacids is described at: http://www.chem.qmul.ac.uk/iupac/AminoAcid/ `citation("seqinr")`

### See Also

`translate`, `a`

### Examples

      # show all allowed values
      allowed <- s2c("*ACDEFGHIKLMNPQRSTVWY")
      aaa(allowed)
      # show what's happen with non-allowed values
      aaa("Z") # should be NA and a warning is generated

[Package seqinr version 1.0-4 Index]