The idea of the meson cloud approach in the chiral quark model has been extended to include a gluon cloud in order to model the parton densities in the nucleon, based on the constituent quark framework. The splitting functions of a quark to quark–meson and quark–gluon at low Q2 values are used to obtain parton densities in the constituent quark approach. The phenomenological constituent model is employed to extract the parton distributions in the proton. Since we have access to the parton densities at low Q2, we are able to obtain the F2(x,Q2) structure function at low Q2 values. The result is in good agreement with the available experimental data and some theoretical models. To confirm the validity of our calculations, the fraction of the totalmomentum of the proton which is carried by gluons at high Q2 and the Gottfried sum rule are computed. The results are in good agreement with those expected.

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