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Proteins (also known as polypeptides) are organic compounds made of amino acids arranged in a linear chain polymer and joined together by peptide bonds. They contain both amine and carboxyl functional groups as well as a varied side chain. Generally, the standard proteins will consist of the following elements:

* Hydrogen * Carbon * Nitrogen * Oxygen * Sulfur, like those in amino acids L-Cysteine and L-Methionine

Occasionally, Selenium is found in proteins, such as those containing the non-standard amino acid L-Selenocysteine, an amino acid that is present in several protein enzymes like glutathione peroxidases, tetraiodothyronine 5' deiodinases, thioredoxin reductases, formate dehydrogenases, glycine reductases and some hydrogenases.

Additionally, depending on the protein, trace metals which act as cofactors may also appear in proteins, such as Iron, in the oxygen-binding site of hemoglobin, the main protein constituent of red blood cells.

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Related Questions

What is proteins composition?

Polymers amino acid and carboxylic acid .


Which tells you more about a protein its amino acid sequences or composition?

i'd go with the amino acid sequences... they are, after all, the second genetic code, meaning they are the blueprint for the function of the amino acid.


What is the chemical bond that forms between the carboxyl group of one amino acid and the amino group of another amino acid?

Peptide bond.


What is an aminogram?

An aminogram is a diagram which shows the amino acid composition of a peptide or protein.


Is formic acid a simple amino acid?

No, formic acid is not a simple amino acid. It is a simple carboxylic acid with the chemical formula HCOOH. Amino acids are organic compounds containing an amino group (-NH2) and a carboxyl group (-COOH).


What is the chemical attraction between the acid group of one amino acid and the amino group of another amino acid can form?

the carboxylic acid group of a amino acid will give of an OH molecule while the amino group of the other will give of an H atom to form ah H2O molecule and while the carboxylic group or the C terminal connect to the amino group of the other giving you CONH as the peptide bond.


What is the chemical name for amino acid?

The word "amino acid" has to my knowledge no chemical name. However below are the names of the twenty different amino acids: Glycine, alanine, valine, leucine, isoleucine, methionine, phenylalanine, tryptophan, proline, serine, threonine, cysteine, tyrosine, asparagine, glutamine, aspartic acid, glutamic acid, lysine, arginine and histidine


Is Reacts with an acid a Physical Property or Chemical Property?

Chemical property because acid is a chemical


What is the amino acid sequnce for aspartate?

There is no amino acid sequence in aspartate.Related Information:Aspartate is the anion of an amino acid by itself: -OOCCH(NH2)CH2COO-Aspartic acid is an α-amino acid with the chemical formula HOOCCH(NH2)CH2COOH. This is one of the 20 proteinogenic amino acids.


What part of an amino acid gives the molecule its characteristics chemical properties?

Mainly The R Group, but also that there is also the particular positions that give the amino acid molecule its characteristic chemical properties. Another is at the -C-C-N- peptide linkage.


What Alpha amino acid is a diamino mono carboxylic acid?

Lysine is the alpha amino acid that is a diamino mono carboxylic acid, as it contains two amino groups (-NH2) and one carboxylic acid group (-COOH) in its chemical structure.


What are the names of the two chemical groups that all amino acids have in common?

Amino = Amine Acid = Carboxylic Acid These two groups are what give amino acid's there name. Source: http://en.wikipedia.org/wiki/Amino_acid