Concept
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Gene Expression in Stem Cells
Symmetric and Asymmetric Division
This diagram illustrates stem cell division and differentiation, through the processes of (1) symmetric stem cell division, (2) asymmetric stem cell division, (3) progenitor division, and (4) terminal differentiation. Stem cells are indicated by (A), progenitor cells by (B), and differentiated cells by (C).
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"Stem cell division and differentiation."
http://en.wikipedia.org/wiki/File:Stem_cell_division_and_differentiation.svg
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