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We analyze the proton electromagnetic form factor ratio$R(Q^{2})=QF_2(Q^{2})/F_1(Q^{2})$ as a function of momentum transfer $Q^{2}$within perturbative QCD. We find that the prediction for $R(Q^{2})$ at largemomentum transfer $Q$ depends on the exclusive quark wave functions, which areunknown. For a wide range of wave functions we find that $ QF_2/F_1 \sim\const$ at large momentum transfer, in agreement with recent JLAB data.Comment: 8 pages, 2 figures. To appear in Proceedings of the Workshop QCD  2002, IIT Kanpur, 18-22 November (2002

The proton electromagnetic form factorF 2 and quark orbital angular momentum