two recent technical advances facilitate the derivation of proliferating hybrids from human diploid fibroblast strains without recourse to biochemical selection : ( 1 ) a new chemically-mediated method of somatic cell fusion ( peg-dmso ) yields hybrids at rates as high as 1 in 160 colonies after dilute plating of treated cell mixtures , and ( 2 ) a simple technology for assessment of dna content ( flow microfluorometry ) permits rapid and highly sensitive monitoring of ploidy .
C0016030
fibroblast
C0007634
cell