def revcomp_str(seq):
    """
	Returns the reverse complement of a `str` nucleotide sequence.

	Parameters
	----------
	+ seq `str` nucleotide sequence
	"""
    comp = str.maketrans('ACGTRYMKWSBDHV', 'TGCAYRKMWSVHDB')
    anti = seq.translate(comp)[::-1]
    return anti
