  We examine the effect of d-wave symmetry on zero bias anomalies in
normal-superconducting tunnel junctions and phase-periodic conductances in
Andreev interferometers. In the presence of d-wave pairing, zero-bias anomalies
are suppressed compared with the s-wave case. For Andreev interferometers with
aligned islands, the phase-periodic conductance is insensistive to the nature
of the pairing, whereas for non-aligned islands, the nature of the zero-phase
extremum is reversed.
