injections of horseradish peroxidase conjugated to wheat germ agglutinin ( hrp-wga ) into the prefrontal cortex produced orthograde labeling in the columnar structures in the deep layers of the superior colliculus , while hrp-wga injections into the somatic sensory cortex resulted in orthograde labeling in the areas outside the columnar structures , so that the distribution patterns of terminals from these two different cortical areas are complementary in the deep layers .
C0078473
horseradish
C0019941
hrp-wga