  The ZEUS inclusive cross-section data from HERA-I, for charged and neutral
current processes, taken with $e^+$ and $e^-$ beams, have been used in a new
NLO QCD analysis to extract the parton distribution functions (PDFs) of the
proton within a single experiment. The precision of the high-$x$ gluon
determination is improved by using ZEUS differential cross-section data on
inclusive jet production in $e^+p$ scattering and di-jet production in
$\gamma-p$ scattering
