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The connecting peptide, or C-peptide, is a short 31-amino-acid polypeptide that connects insulin's A-chain to its B-chain in the proinsulin molecule. In the context of diabetes or hypoglycemia, a measurement of C-peptide blood serum levels can be used to distinguish between different conditions with similar clinical features.
Natriuretic peptide precursor C, also known as NPPC, is a protein that in humans is encoded by the NPPC gene. [ 5 ] [ 6 ] [ 7 ] The precursor NPPC protein is cleaved to the 22 amino acid peptide C-type natriuretic peptide ( CNP ).
The C peptide-A chain junction occurs between residues 64 and 65 of proinsulin. These are lysine and arginine molecules, respectively. [10] The C peptide-B chain connection is between two arginine residues at positions 31 and 32 of proinsulin. [10] There is conservation of much of the structure of proinsulin among mammalian species, with much ...
Oxytocin is a peptide hormone and neuropeptide normally produced in the hypothalamus and released by the posterior pituitary. [4] Present in animals since early stages of evolution, in humans it plays roles in behavior that include social bonding, love, reproduction, childbirth, and the period after childbirth.
The primary function of the blood-brain barrier is to protect the brain and keep it isolated from harmful toxins that are potentially in the blood stream.It accomplishes this because of its structure, as is usual in the body that structure defines its function.
A peptidergic agent (or drug) is a chemical which functions to directly modulate the peptide systems in the body or brain. An example is opioidergics, which are neuropeptidergics. A cell-penetrating peptide is a peptide able to penetrate the cell membrane.
Substance P and the NK1-receptor are widely distributed in the brain and are found in brain regions that are specific to regulating emotion (hypothalamus, amygdala, and the periaqueductal gray). [12] They are found in close association with serotonin (5-HT) and neurons containing norepinephrine that are targeted by the currently used ...
Glutamate is a very major constituent of a wide variety of proteins; consequently it is one of the most abundant amino acids in the human body. [1] Glutamate is formally classified as a non-essential amino acid, because it can be synthesized (in sufficient quantities for health) from α-ketoglutaric acid, which is produced as part of the citric acid cycle by a series of reactions whose ...