def seqToGenbankLines(seq):
    """ chunk sequence string into lines each with six parts of 10bp, return as a list
    >>> seqToGenbankLines("aacacacatggtacacactgactagctagctacgatccagtacgatcgacgtagctatcgatcgatcgatcgactagcta")
    ['aacacacatg gtacacactg actagctagc tacgatccag tacgatcgac gtagctatcg', 'atcgatcgat cgactagcta']
    """
    # first chunk into 10bp parts
    parts = [seq[i:i+10] for i in range(0, len(seq), 10)]

    # put into lines of 6*10 bp
    lines = []
    for i in range(0, len(parts), 6):
        lines.append(" ".join(parts[i:i+6]))
    return lines