Cystine

Amino Acids in Therapy Amino Revolution

Cystine is an amino acid.

The molecular formula of cystine is C3H7NO2S

Amino acids generally are explained further in the column on the rightin further detail below. Briefly, there are two types of amino acid:

  1. Those that can be synthesized by the body itself (non-essential amino acids), and
  2. those that, although necessary for the healthy growth or maintenance of the body, cannot be produced by the body itself.
    This second type of amino acids are called essential amino acids, and are also referred to as indispensible amino acids in some textbooks.

Cystine is a "non-essential" or "dispensible" amino acid because, although its presence in an appropriate quantity is important for good health, the human body can produce this chemical from an excess of certain other amino acids in the body. Therefore it is not essential as a part of the diet.

Cystine is sometimes described as a "natural sulphur antibiotic", which can be explained by its sulphur content - as indicated in its chemical formula. The presence of this sulphur component is responsible for some of the main functions of cystine. For example, the disulphide (S-S) links between adjacent molecules in the polypeptide chains formed by cystine help to form the 3-dimensional structures of the proteins of which they are part.

Cystine is also an important part of many enzymes.


Textbooks about Amino Acids and Biochemistry:

Amino Acids in Therapy Amino Acids Biochemistry and Nutrition Amino Revolution Heinerman's Encyclopedia of Healing Juices

For further information about amino acids in general, see Amino Acids.

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