  In this high-$x$ region, both the flavour content and structure of the
nucleon parton distribution functions remains relatively poorly known. New LHCb
measurements of Z and charm jet associated production could indicate a
valence-like intrinsic-charm component in the proton wave function, and
measurements of Z production in pPb collisions provide new constraints on the
partonic structure of nucleons bound inside nuclei. Here we will discuss these
new LHCb measurements and comparisons with state-of-the-art parton distribution
function calculations.
