  Our original suggestion to investigate exclusive $\pi^0$ electroproduction as
a method for extracting the tensor charge, transversity, and other quantities
related to chiral odd generalized parton distributions from cross section and
asymmetry data is reviewed. We explain some of the details of the process: {\it
i)} the connection between the helicity description and the cartesian basis;
{\it ii)} the dependence on the momentum transfer squared, $Q^2$, and {\it
iii)} the angular momentum, parity, and charge conjugation constraints
($J^{PC}$ quantum numbers).
