to investigate further the selectivity of retrograde axonal transport of horseradish peroxidase ( hrp ) isoenzymes previously observed in the rat central visual pathways , cultured mouse neuroblastoma cells ( clone n18 ) were examined for selectivity of endocytosis of peroxidases and cationized ferritin in vitro .
C0019941
horseradish peroxidase
C0031179
peroxidases