sequence

DnaSequence(moltype, seq, *[, name, info, ...])	Holds the standard DNA sequence.
RnaSequence(moltype, seq, *[, name, info, ...])	Holds the standard RNA sequence.
ProteinSequence(moltype, seq, *[, name, ...])	Holds the standard Protein sequence.
SeqView(*, parent, alphabet, parent_len[, ...])	Provides a view of a sequence with support for slicing operations.