explants from each species , incubated in medium containing 0.5 microm [ 14c ] -afb1 for selected intervals up to 24 h , were compared on the basis of binding of [ 14c ] -afb1 to tracheal dna , amount and type of afb1 metabolites in the medium , ultrastructurally determined population densities of epithelial cells , and distribution of bound material in epithelium as determined by autoradiographic grain densities .
C0014597
epithelial
C0014609
epithelium