It had become supercoiled circular DNA again. And the EcoRI site had regenerated.” At the time, scientists assumed that all restriction enzymes probably left blunt ends when they cut DNA because the ...

When they act on a DNA molecule, restriction enzymes produce "blunt" ends when they cut in the middle of the recognition sequence, and they yield "sticky" ends when they cut at the recognition ...

Bacteria protect their DNA by modifying their own recognition ... yielding what are known as blunt-end fragments (see Figure 3, in which PvuII similarly produces blunt-end fragments).