Cell Separation
These two cell populations are kept separate by a mechanism of cell segregation linked to the heritable expression of a selector gene. A selector gene is one that is expressed in one group of cells but not the other, giving the founder cells and their descendants different instructions. Eventually these selector genes become fixed in either an expressed or unexpressed state and are stably inherited to the descendants, specifying the identity of the compartment and preventing these genetically different cell populations from intermixing. Therefore, these selector genes are key for the formation and maintenance of lineage compartments.
Read more about this topic: Compartment (development)
Famous quotes containing the words cell and/or separation:
“She that but little patience knew,
From childhood on, had now so much
A grey gull lost its fear and flew
Down to her cell and there alit,
And there endured her fingers’ touch
And from her fingers ate its bit.”
—William Butler Yeats (1865–1939)
“On a subconscious level your child experiences separation from you as a “punishment.” And if he is to be “rewarded” with your return, he must be very good.... Eager for you to come back, your finicky son would probably eat liver if your baby-sitter served it, and he wouldn’t dream of resisting her at bathtime.”
—Cathy Rindner Tempelsman (20th century)