fertcart.blogg.se - The highbrow

The highbrow how to#

Proteins catalyze the vast majority of chemical reactions that occur in the cell. Proteins are of primary importance to the continuing functioning of life on Earth. The amino acids differ from each other in the particular chemical structure of the R group. The remaining two bonds of the α-carbon atom are generally satisfied by a hydrogen (H) atom and the R group. Each molecule contains a central carbon (C) atom, called the α-carbon, to which both an amino and a carboxyl group are attached. The term amino acid is short for α-amino carboxylic acid. Phosphorylation serves a critical role in the regulation of protein function and cell signaling.Īmino acids See all videos for this articleĪmino acid, any of a group of organic molecules that consist of a basic amino group (―NH 2), an acidic carboxyl group (―COOH), and an organic R group (or side chain) that is unique to each amino acid.

The most important posttranslational modification of amino acids in eukaryotic organisms (including humans) is phosphorylation, in which a phosphate molecule is added to the hydroxyl portion of the R groups of serine, threonine, and tyrosine.

Among the latter is γ-carboxyglutamic acid, a calcium-binding amino acid residue found in the blood-clotting protein prothrombin.

Nonstandard amino acids basically are standard amino acids that have been chemically modified after they have been incorporated into a protein (posttranslational modification) they can also include amino acids that occur in living organisms but are not found in proteins.

The 20 (or 21) amino acids that function as building blocks of proteins are classified as standard.

Amino acids typically are classified as standard or nonstandard, based on the polarity, or distribution of electric charge, of the R group (side chain).

SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.

Learn about the major environmental problems facing our planet and what can be done about them!

Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.

The highbrow how to#

COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.

Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.

From tech to household and wellness products.

Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.

This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.