Comparing E620 - Glutamic acid vs E429 - peptone
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Found in 115 products
Found in 2 products
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Interest over time for 3 keywords in U.S. during the last 10 years.
Interest over time for 3 keywords in U.S. during the last 10 years.
Popular questions
Is glutamic acid the same as glutamine?
No. Glutamic acid (E620) is an amino acid, while glutamine is its amide derivative; they’re related but chemically distinct and serve different roles.
Is glutamate the same as glutamic acid?
They’re the deprotonated (glutamate) and protonated (glutamic acid, E620) forms of the same molecule; at typical physiological and food pH, glutamate predominates.
Is glutamic acid acidic or basic?
Acidic—glutamic acid has two carboxyl groups and is largely present as its negatively charged form (glutamate) at neutral pH.
Is glutamic acid the same as glutamate?
Yes—glutamate is the ionized form of glutamic acid (E620); which term is used depends on pH or whether it’s in a salt (e.g., MSG).
Are glutamate and glutamic acid the same?
Yes—they refer to the same substance in different forms: glutamic acid is the acid, and glutamate is its anion or salt.
What is a peptone?
A peptone is a water‑soluble mix of short peptides, amino acids, and nutrients made by partial hydrolysis of proteins (e.g., casein, meat, or soy); it’s used as a nutrient source in culture media (tryptone is a casein peptone).
What is the purpose of peptone in the media?
It supplies readily assimilable nitrogen (peptides and amino acids), vitamins, and minerals to support microbial growth, including fastidious organisms.
How to make peptone water?
Dissolve 10 g peptone and 5 g sodium chloride in 1 L purified water, adjust pH to about 7.2 at 25°C, dispense, and sterilize by autoclaving at 121°C for 15 minutes.
What is buffered peptone water?
A phosphate‑buffered version of peptone water (per liter: peptone 10 g, NaCl 5 g, Na2HPO4 3.5 g, KH2PO4 1.5 g; pH ~7.2) used as a non‑selective pre‑enrichment medium to resuscitate stressed bacteria, especially Salmonella, from foods.
What is peptone in microbiology?
In microbiology, peptone refers to protein hydrolysates (from casein, meat, soy, etc.) rich in peptides and amino acids that serve as the main nitrogen source in culture media; different peptones (e.g., tryptone) can influence growth and test outcomes.