Gluon and quark distributions in large N_c QCD: theory vs. phenomenology
  We present the QCD analysis of the behavior of quark and gluon distributions in the limit of a large number of colors N_c. We show that the results agree qualitatively with the phenomenological data. In particular we draw attention to the fact that the polarized gluon distribution is suppressed at large N_c compared to the unpolarized one. 
A.V. Efremov, K. Goeke and P.V. Pobylitsa