SORU: parçaya göre cevaplayınız
It is clear that the study mentioned in the passage revealed that ----.
A team of scientists have recently identified one of the
molecules responsible for the tubular shape of blood
vessels. Originally known for regulating blood vessel
development for life, the vascular endothelial growth factor
(VEGF) proteins analyzed by the research team have
proven to be more interesting than initially thought. The
team found that a certain variation of VEGF attracts an
“instructor” protein. When this variant, with the instructor
protein attached, docks with a receptor on the surface of a
cell, a signal telling the cell to form a tube-like shape with
its neighbours is sent to it. When the instructor cell is
absent, the cells line up next to one another to form a
sheet. Scientists believe that not only could this
contribution allow blood vessels to be created from stem
cells, but the discovery might be employed in other tubelike
structures in the body, such as the lungs and the
intestines. Far from being confined to blood vessels, the
discovery thus opens the door to resolving the problem of
three-dimensional reconstruction of organs from stem cells.