Description:
<jats:p>
<jats:italic>Treponema pallidum</jats:italic>
DNA was cloned in a bacteriophage. Clones were screened for expression of
<jats:italic>Treponema pallidum</jats:italic>
antigens by an in situ radioimmunoassay on nitrocellulose, with the use of subsequent reactions with syphilitic serum and radioiodinated
<jats:italic>Staphylococcus aureus</jats:italic>
protein A. One clone, which gave a strong signal, codes for at least seven antigens that react specifically with human antibodies to
<jats:italic>Treponema pallidum</jats:italic>
.
</jats:p>