Reverse and complement sequences
seq_complement(x)
seq_reverse(x)a DNA or RNA vector.
Function seq_reverse also accepts AA vectors.
A reverse or complement sequence (same class as the input).
Other biological operations: 
seq_rev_translate(),
seq_translate(),
transcription
x <- dna("ACTTTGGCTAAG")
seq_reverse(x)
#> DNA vector of 1 sequences
#> >   GAATCGGTTTCA
seq_complement(x)
#> DNA vector of 1 sequences
#> >   TGAAACCGATTC