  We study the electromagnetic nucleon form factors within the approach based
on light-cone sum rules. We include the next-to-leading-order corrections for
the contributions of twist-three and twist-four operators and a consistent
treatment of the nucleon mass corrections in our calculation. It turns out that
a self-consistent picture arises when the three valence quarks carry
$40\%:30\%:30\%$ of the proton momentum.
