| chars {bioseq.fasta} | R Documentation |
chars(
type = Protein);a character vector of the alphabet letters of the given molecule type: the A/C/G/T/U/N letters for the DNA or RNA nucleotide sequence, or the 20 standard amino acid letters for the protein sequence.
an error will be thrown if the given sequence type is not a valid biological sequence type(DNA/RNA/Protein).