Moreover, PFKFB3 overexpression in zebrafish drives EC specification into sprout forming tip cells, even in the presence of tip cell-inhibitory Notch signals that promote proliferating stalk elongating cells (De Bock et al, 2013b).
Yeon et al. showed that ECs within gel mixtures lacking collagen could not form tip cells for angiogenesis or vacuoles that form the lumen and undergo regression after a few days.
Kazmierczak, P. et al. Cadherin 23 and protocadherin 15 interact to form tip-link filaments in sensory hair cells.
There is little disagreement that strict asexuality is an evolutionary dead-end in 'higher' organisms and that most asexual metazoans only form tips of the tree of life.
STRC encodes stereocilin, which localizes to the tips of outer-hair-cell stereocilia where it is hypothesized to form tip-link connectors between stereocilia as well as part of the connection between outer hair cells and the tectorial membrane [ 25].
The stress concentration zones migrates at the newly formed crack tip, causing a faster increase of the damage parameter in the elements near the crack tip.
In (e), well-defined CNFs, apparently formed by tip growth, were clearly visible as seen by the red-coloured circles.
Another difference was in the process that a flat tip was formed from a virgin tip, not from a tip wasted after several tens of scans for imaging.
As new membrane is formed at the tip, the tip volume increases.
Along with the predentary bone, which forms the tip of the lower jaw in all ornithischians, the rostral forms a superficially parrot-like beak.
Furthermore amino acids Q138, P139 and D140 forming the tip of the loop appear critical for binding.
