It was also revealed that cold- and ABA-related cis-elements in roots and SA-related cis-elements in stems might exist outside the region contained in the B1S3 construct.
Several evidences suggest that normal neural stem cells, and likely also neural cancer stem cells, exist within protective niches as the vascular niches, into which endothelial cells secrete factors that regulate neural stem cell function [ 45, 46].
The stem cells exist in niches formed by other cells, which secrete substances that keep the stem cells alive and active.
The proliferation of models of STEM that exist and the associated lack of practical advice creates general confusion about integrated STEM that requires clarification, especially for teachers charged with implementing integrated STEM in classrooms (Bybee, 2010).
Cancer stem cells exist as a minority population within the tumor and share many genetic and biologic characteristics of normal stem cells.
In normal brain, neural stem cells exist in vascular niches where endothelial cells provide direct cell contacts and secreted factors that regulate neural stem cell function [ 29, 30].
The stem cells exist inside this early-stage embryo, ready to be extracted for research.
And what embryonic stem cells exist turn out to be mostly commercially owned.
For well over a decade, he had been working on a hunch that pluripotent stem cells exist in all mammalian tissue, ready to swing into action whenever needed.
These stem cells exist only briefly before they begin to differentiate into more specialized tissues -- there one moment and gone the next, transients vanishing into the great biology of becoming.
