following unilateral injections of wheat germ agglutinin-conjugated horseradish peroxidase ( wga-hrp ) , dual labeling was most evident in a large population of neurons located in the dorsal , medial and commissural nuclei of the solitary tracts , ipsilateral to the side of the injection .
C0019941
horseradish peroxidase
C0078473
wga-hrp