  We propose a parametrization for the generalized parton distributions (GPDs)
which is based on representation of parton distributions as an infinite series
of t-channel exchanges. The entire generalized parton distribution is given as
an infinite sum over contributions of generalized light-cone distribution
amplitudes in the t-channel. We also discuss the relations of the lowest Mellin
moments of GPDs to basic mechanical characteristics of the nucleon as a
compound system.
