This is the
paper I was speaking about. It is an amazing paper.
Paper by Watve M, Parab S, Jogdand P, and Keni S
Here is part of the abstract.
Aging is known in all organisms that have different somatic and reproductive cells or in unicellular organisms that divide asymmetrically. Bacteria that divide symmetrically were believed to be immune to natural aging. The demonstration of functionally asymmetric division and aging in Escherichia coli recently has challenged this belief and led to the suggestion that aging might be inevitable for all life forms. We modeled the effects of symmetric and asymmetric division in bacteria to examine selective advantages of the alternative strategies of division.
This paper shows that while immortality can exists, it exits in
E. coli as a strategy of segregating new cellular components from old components.