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We have performed an evaluation of the individual up- and down-flavorcontributions to the nucleon electromagnetic form factors within a relativisticconstituent-quark model. It is found that the theoretical parameter-freepredictions agree surprisingly well with recent experimental data from a flavordecomposition of the proton and neutron electromagnetic form factors formomentum transfers up to $Q^2\sim\;$3.5 GeV$^2$. It means that in this regimethree-quark valence degrees of freedom dominate and other contributions, suchas explicit mesonic effects, can at most play a minor role.

Flavor analysis of nucleon electromagnetic form factors