we studied afferents to the parabrachial nucleus ( pb ) from the spinal cord and the spinal trigeminal nucleus pars caudalis ( snvc ) in the rat by using the anterograde and retrograde transport of wheat germ agglutinin conjugated to horseradish peroxidase ( wga-hrp ) .
C0019941
horseradish peroxidase
C0078473
wga-hrp