Incorporation of Heterologous Deoxyribonucleic Acid into Mammalian Cells.

Particles containing large molecular heterologous deoxyribonucleic acid have been incorporated into strain L cells in suspension tissue culture. The particles are Feulgen-positive, they are fluorescent under ultraviolet light when stained with acridine orange, and they appear in both the nucleus and cytoplasm in radioautographic preparations.