it would appear , therefore , that within the limitations of the techniques employed the alimentary canal epithelium and the underlying fibroblasts , while allowing bpv-2 dna replication , are nonpermissive for the expression of the viral vegetative functions and that transformation of the epithelial cells , like transformation of fibroblasts , can take place in the absence of infectious viral progeny .
C0014609
epithelium
C0014597
epithelial cells