   sequences.  You should instead take care of this before
                    submitting.
                </p>
                <p>
                    Optionally accepts a (<em>highly recommended</em>) <code>base</code>
                    parameter set to <code>nucleotide</code> or <code>amino
                    acid</code> which forces all sequences to be interpreted as
                    the given base type.  This is necessary when submitting
                    sequences with an ambiguous base type d