  Nuclear effects in deep inelastic scattering at low$-x$ are
phenomenologically described changing the typical dynamical and/or kinematical
scales characterizing the free nucleon case. In a holographic approach, this
rescaling is an analytical property of the computed structure function
$F_2(x,Q^2)$. This function is given by the sum of a conformal term and of a
contribution due to quark confinement, depending on IR hard-wall parameter
$z_0$ and on the mean square distances, related to a parameter $Q^\prime$,
among quarks and gluons in the target. The holographic structure function per
nucleon in a nucleus $A$ is evaluated showing that a rescaling of the typical
nucleon size, $z_0$ and $Q^\prime$, due to nuclear binding, can be reabsorbed
in a $Q^2$-rescaling scheme. The difference between neutron and proton
structure functions and the effects of the longitudinal structure functions can
also be taken into account. The obtained theoretical results favourably compare
with the experimental data.
