  We present the unpolarized and helicity parton distribution functions
calculated within lattice QCD simulations using physical values of the light
quark mass. Non-perturbative renormalization is employed and the lattice data
are converted to the MSbar-scheme at a scale of 2 GeV. A matching process is
applied together with target mass corrections leading to the reconstruction of
light-cone parton distribution functions. For both cases we find a similar
behavior between the lattice and phenomenological data, and for the polarized
PDF a nice overlap for a range of Bjorken-x values. This presents a major
success for the emerging field of direct calculations of quark distributions
using lattice QCD.
