Related Experiment Video
Updated: Jul 23, 2026

07:48
A High-throughput Automated Platform for the Development of Manufacturing Cell Lines for Protein Therapeutics
Published on: September 22, 2011
[Heterogeneity of L-line cells in the early stages of clone development]
Abstract:
The clonal study of L cell culture has shown that the clone-forming cells are heterogeneous both in form and in the activities of enzymes (succinate dehydrogenase, lactate dehydrogenase, NAD- and NADP-diaphorase) which were determined by histochemical methods. The morphological heterogeneity is characteristic for clones with not less than 10 cells manifesting itself earlier and heterogeneity as to the activity of the studied enzymes--later, in clones with more than 15-20 cells.
Related Concept Videos
Lineage Commitment
Commitment is the process whereby stem cells:
Cell Lines
A cell line is a population of cells grown in vitro that can be subcultured over several generations. Normal cells cease to divide after a certain number of cell divisions, a process known as replicative senescence. This number, called the Hayflick limit, was conceptualized by Leonard Hayflick in 1961 when he observed that fetal cells grown in culture could only divide 40-60 times. This limit is due to the shortening of the telomeres during each round of cell division, preventing cell division...

