  We use the nCTEQ analysis framework to investigate nuclear Parton
Distribution Functions (nPDFs) in the region of large x and intermediate-to-low
$Q$, with special attention to recent JLab Deep Inelastic Scattering data on
nuclear targets. This data lies in a region which is often excluded by $W$ and
$Q$ cuts in global nPDF analyses. As we relax these cuts, we enter a new
kinematic region, which requires new phenomenology. In particular, we study the
impact of i) target mass corrections, ii) higher twist corrections, iii)
deuteron corrections, and iv) the shape of the nuclear PDF parametrization at
large-$x$ close to one. Using the above tools, we produce a new nPDF set (named
nCTEQ15HIX) which yields a good description of the new JLab data in this
challenging kinematic region, and displays reduced uncertainties at large $x$,
in particular for up and down quark flavors.
