after horseradish peroxidase conjugated to wheat germ agglutinin ( wga-hrp ) was injected into the prepositus in squirrel monkeys ( saimiri sciureus ) , the largest populations of retrogradely labeled neurons were found in the vestibular nuclei , the contralateral perihypoglossal nuclei , and the medullary and pontine reticular formation .
C0019941
horseradish peroxidase
C0078473
wga-hrp