when transverse sections of l3 o. circumcincta , taken from the anterior pharyngeal region , were further examined by electron microscopy , after immunogold staining with rabbit anti-gp31 antiserum , the gp31 antigen was found to be specifically located in 'secretory organelles ' within the cells of the oesophageal glands .
C1327616
secretory
C0007634
cells