natural amino acids
L-amino acids, only these occur in proteins
Amino acids are the building blocks of proteins. There are 20 commonly occurring amino acids that are involved in the creation of proteins, and they can be classified as either natural or non-natural or synthetic.
Natural amino acids are the ones that are found in living organisms and are needed for the production of proteins and other biological molecules. These amino acids can be further classified as essential or non-essential amino acids.
The nine essential amino acids are ones that the body cannot produce on its own and must be obtained through the diet. These are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
The eleven non-essential amino acids are those that the body can produce on its own, so it is not necessary to obtain them through the diet. These include alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.
In summary, natural amino acids are the ones that are found in living organisms and are necessary for the production of proteins and biological molecules. They can be further classified as essential or non-essential amino acids, depending on whether or not the body can produce them on its own.
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