by nucleic acid competition hybridization , mpv rna was found to be indistinguishable from the rna of a virus ( x381 ) isolated from a rhesus mammary gland and from rna isolated from the cytoplasm of ao cells ( parks et al. , 1973 ) and hela cells ( gelderblom et al. , 1974 ) , both previously reported to produce mpv-related particles .
C0010834
cytoplasm
C0007634
cells