new growing cell tip

A cell tip that was newly formed at the last cell division, and that has started to grow after the cell has activated bipolar cell growth (i.e. in which new end take-off, NETO, has taken place). New end take-off is when monopolar cells initiate bipolar growth.

old cell tip after activation of bipolar cell growth

A cell tip which has existed for at least one complete cell cycle, and at which polarized growth occurs, which is part of a cell that has activated bipolar cell growth (i.e. in which new end take-off, NETO, has taken place). For example, in fission yeast the cell end that existed prior to cell division grows immediately after division, and contains a distinctive complement of proteins including actin cytoskeletal structures.