Simulation of the branching process in 2 dimensions, e.g. in the mammary gland. Red denotes the tips that are still actively proliferating. Disclaimer: AAAS and EurekAlert! are not responsible for the ...

The re-transcribed DNA is then integrated into the genome of the host cell (Figure 2). This process requires the absence of the nuclear membrane and thus is restricted to the M-phase of proliferating ...