def get_coordinates(region):
    """ Define coordinates chr, start pos and end positions
    from region string chrX:start-end. Return coordinate list.
    """
    chromosome = region.split(":")[0]
    coord = region.split(":")[1]
    coord_list = coord.split("-")
    begin = int(coord_list[0])
    end = int(coord_list[1])
    return [chromosome, begin, end]