We examine commonly used approaches to deal with the scattering of electrons from a bound nucleon. Several prescriptions are shown to be related by gauge transformations. Nevertheless, due to current nonconservation, they yield different results. These differences reflect the size of the uncertainty that persists in the interpretation of (e,${\mathit{e}}^{\prime }$p) experiments. © 1996 The American Physical Society.

• Received 21 December 1995

DOI:https://doi.org/10.1103/PhysRevC.53.2304