the immunoreactivity of the anti-leu 7 ( hnk-1 ) monoclonal antibody , a marker for natural killer cells , was evaluated with the peroxidase-anti-peroxidase ( pap ) method on sections of human paraffin-embedded tissues from 135 tumors of the central nervous system and five esthesioneuroblastomas .
C0027021
peroxidase
C0086418
human