def CpG(sequence, size=200):
    """
    The Sequence Manipulation Suite: CpG Islands
    Results for 1200 residue sequence "sample sequence" starting "taacatactt".
    CpG islands search using window size of 200.
    Range, value
    32 to 231, the y-value is 1.75 and the %GC content is 50.5
    33 to 232, the y-value is 1.75 and the %GC content is 50.5


    Gardiner-Garden M, Frommer M. J Mol Biol. 1987 Jul 20;196(2):261-82.

    """
    pass
