### Name: DNAString-class
### Title: The DNAString class
### Aliases: class:DNAString DNAString-class DNA_ALPHABET
###   initialize,DNAString-method DNAString alphabet,DNAString-method
### Keywords: methods classes

### ** Examples

  DNA_ALPHABET
  d <- DNAString("TTGAAAA-CTC-N")
  length(d)
  alphabet(d)