  The disk around HD 142527 attracts a lot of attention, amongst others because
of its resolved (sub) mm dust continuum that is concentrated into a
horseshoe-shape towards the north of the star. In this manuscript we present
spatially resolved ALMA detections of the HCN J=4-3 and CS J=7-6 emission
lines. These lines give us a view deeper into the disk compared to the
(optically thicker) CO isotopes. This is the first detection of CS J=7-6 coming
from a protoplanetary disk. Both emission lines are azimuthally asymmetric and
are suppressed under the horseshoe-shaped continuum emission peak. A possible
mechanism to explain the decrease under the horseshoe-shaped continuum is the
increased opacity coming from the higher dust concentration at the continuum
peak. Lower {\gr dust and/or gas} temperatures and an optically thick
radio-continuum reduce line emission by freeze-out and shielding of emission
from the far side of the disk.
