three ataxia telangiectasia homozygotes , one heterozygote and normal fibroblast strains were compared as to the capacity of their cellular extracts to enhance the priming activity of gamma-irradiated colicin e1 dna for purified dna polymerase ( ec 2.7.7.7 ) of escherichia coli .
C0016030
fibroblast
C0007634
cellular