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What (who) is juxtaglomerular granules - definition

DENSE AGGREGATION IN THE CELL CYTOSOL COMPOSED OF PROTEINS AND RNAS THAT APPEAR WHEN THE CELL IS UNDER STRESS

Stress granules

Juxtaglomerular cell

CELL TYPE

Juxtaglomerular cells; Granular cell; JG cells; JG cell; Granular cells

Juxtaglomerular cells (JG cells), also known as granular cells are cells in the kidney that synthesize, store, and secrete the enzyme renin. They are specialized smooth muscle cells mainly in the walls of the afferent arterioles (and some in the efferent arterioles) that deliver blood to the glomerulus.

https://en.wikipedia.org/wiki/Juxtaglomerular_cell

Cellulin

TYPE OF POLYSACCHARIDE

Cellulin granules; Cellulin granule

Cellulin or cellulin granules are a type of polysaccharide found exclusively within the oomyceteous fungi of the order Leptomitales.

https://en.wikipedia.org/wiki/Cellulin

Volutin granules

COMPLEXED INORGANIC POLYPHOSPHATE

Volutin; Metachromatic granules

Volutin granules are an intracytoplasmic storage form of complexed inorganic polyphosphate, the production of which is used as one of the identifying criteria when attempting to isolate Corynebacterium diphtheriae on Löffler's medium. Polyphosphate granules display the metachromatic effect, appearing red when stained with methylene blue.

https://en.wikipedia.org/wiki/Volutin_granules

Wikipedia

Stress granule

In cellular biology, stress granules are biomolecular condensates in the cytosol composed of proteins and RNAs that assemble into 0.1–2 μm membraneless organelles when the cell is under stress. The mRNA molecules found in stress granules are stalled translation pre-initiation complexes associated with 40S ribosomal subunits, translation initiation factors, poly(A)+ mRNAs and RNA-binding proteins (RBPs). While they are membraneless organelles, stress granules have been proposed to be associated with the endoplasmatic reticulum. Note that there are also nuclear stress granules. This article is about the cytosolic variety.

https://en.wikipedia.org/wiki/Stress granule