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Correct answer is ... Seeds have endosperm which provides nourishment for a new plant, but spores do not have any stored food supplies. :)
The most popular injectable augmentation product is a hyaluronic acid-based filler because it is more effective and safe than other injection fillers. Although the problem of infected filler is well established, it is unclear how long the filler will last before being absorbed. A case of hyaluronic acid-based filler-exacerbated facial cellulitis that occurred 2.5 years after filler administration was presented.
<h3>What are Injectable filler ?</h3>
Injectable filler is a soft tissue filler that can be injected into the skin at various depths to smooth out facial wrinkles, add volume to the face, and enhance facial characteristics.
- When it comes to filling up wrinkles, creases, and sagging skin, hyaluronic acid fillers are a fantastic alternative. The procedure is not overly intrusive, the results show up right away, and it takes six to 18 months to complete.
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A protein kinase that is specific to the amino acids serine and threonine is known as a mitogen-activated protein kinase (MAPK or MAP kinase; also known as a serine/threonine-specific protein kinase).
<h3>Mitogen-activated protein kinase :</h3>
A small number of cell surface receptors can ultimately generate a large intracellular response due to activation of kinase cascades.
In order to trigger an appropriate physiological response, such as cellular proliferation, differentiation, development, inflammatory reactions, and death in mammalian cells, MAPK pathways relay, amplify, and integrate information from a variety of stimuli.
Tyrosine phosphorylation, specifically numerous tyrosines on each RTK in the dimer, is how cross-linking triggers the tyrosine kinase activity in these RTKs. The term "cross-phosphorylation" refers to this action.
The activation of a MAPKKKK or MAPKKK by stimulation of plasma membrane receptors is the initial stage of signal transduction. The MAPKKK then phosphorylates two serine or threonine residues in the S/T-X5-S/T (X is any amino acid) motif of its activation loop, activating a downstream MAPKK.
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