  We study linear electron transport through a molecular wire sandwiched
between nanotube leads. We show that the presence of such electrodes strongly
influences the calculated conductance. We find that depending on the quality
and geometry of the contacts between the molecule and the tubular reservoirs,
linear transport can be tuned between an effective Newns spectral behavior and
a more structured one. The latter strongly depends on the topology of the
leads. We also provide analytical evidence for an anomalous behavior of the
conductance as a function of the contact strength.
