Expression
LIF is normally expressed in the trophectoderm of the developing embryo, with its receptor LIFR expressed throughout the inner cell mass. As embryonic stem cells are derived from the inner cell mass at the blastocyst stage, removing them from the inner cell mass also removes their source of LIF.
Read more about this topic: Leukemia Inhibitory Factor
Famous quotes containing the word expression:
“They are not callow like the young of most birds, but more perfectly developed and precocious even than chickens. The remarkably adult yet innocent expression of their open and serene eyes is very memorable. All intelligence seems reflected in them. They suggest not merely the purity of infancy, but a wisdom clarified by experience. Such an eye was not born when the bird was, but is coeval with the sky it reflects. The woods do not yield another such a gem.”
—Henry David Thoreau (1817–1862)
“No compliment can be eloquent, except as an expression of indifference.”
—George Eliot [Mary Ann (or Marian)
“It is the supreme art of the teacher to awaken joy in creative expression and knowledge.”
—Albert Einstein (1879–1955)