fractionation of lysates of cells incubated for 0.5 min at 37 degrees c after dna uptake at 30 degrees c in the presence of low concentrations of phi w-14 dna ( 0.1 microgram/ml ) demonstrated the presence of single-stranded transforming dna molecules , typical for dna taken up by b. subtilis .
C0012935
single-stranded
C0012854
dna