The 20 amino acids vary in structure by the R-group, otherwise all amino acids are the same in structure. All amino acids have a carboxyl group, an amino group, an R-group, and a hydrogen which are all bonded to a central carbon. It is the R-groups that make the amino acids react in different ways and alter the structure of the protein.
Ribose and amino acid is not related. Ribose is the pentose found in RNA, which is a nucleic acid. Amino acid, on the other hand, is the basic building block of proteins.
phenylalanine
Riboflavin, also known as vitamin B2, is present in the body as coenzyme FAD and FMN. It is a component of various enzymes including amino acid oxidase, which is involved in the metabolism of amino acids.
Acetylneuraminic acid is another name for sialic acid, one of a group of amino carbohydrates, which is a component of glycoproteins and mucoproteins.
B2
The 'R' group (side-chain).
Cysteine is an amino acid, which is part of the macromolecule protein.
The amino acid that is most common in all three animals (humans, dogs, and birds) is glycine. Glycine is the simplest amino acid with a hydrogen atom as its side chain, making it a versatile component of proteins.
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Amino acid is not a component of a nucleotide. Nucleotides are made up of a phosphate group, a sugar molecule, and a nitrogenous base. Amino acids are the building blocks of proteins, not nucleotides.
All proteins are compounds comprised of amino acids. Amino acids contain amine (-NH2) and carboxylic acid (-COOH) groups. Nitrogen is an essential component of the amine group in all proteins.
proline is not an amino acid it is an imino acid