def _read(self, arr, start, end, strand):
# get bitarray
b = BitArrayTrack._read(self, arr, start, end)
# decode to sequence
codec_dict = _decoders[self.bpb]
seq = ''.join(b.decode(codec_dict))
if strand == NEG_STRAND:
seq = dna_reverse_complement(seq)
return seq
