Cell polarity in <i>E</i>. <i>coli</i> cells.

<p>The cell polarity can be determined by tracking a lineage. Because division cleaves the short axis (-—-) of the cell, poles formed at the cleavage are new (N) and distal poles are old (O). After the next division, the daughter receiving the mother’s new pole is the new daughter and the other is the old daughter.</p>