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| Peptide is a chain varying in length with repeated sequences of a single building blocks also known as monomers. The basic building block used in the peptide chain are Amino Acids and there are around 20 Amino Acids which are found naturally. <br>Peptides are formed when two or more Amino Acids condense (lose of water molecule H2O) and forms a peptide bond in between (Figure 1), when a molecule consists of 2 up to 50 Amino Acid it is referred to as a peptide. However, when it exceeds 50 Amino Acid it is called a protein. <br>Peptides are found in the human body in every cell and tissue, depending on the structural sequence of the Amino Acid in the peptide the function of it is determined respectively. <br>The most familiar activity of peptides in the human body acts as a hormone, the basic function in which signals and messages are send across body tissues and cells. There are two main classes of hormonal peptides, the first is peptide hormone which are produced in glands, and some other parts such as the stomach, the intestine and brain. An example of a peptide hormone is in blood glucose regulation such as insulin and glucagon. Hormonal peptides can be also found in glands and the brain, an example would be antidiuretic hormone also known as (ADH) which is released in the blood to regulate the water in the body<sup>[1]</sup>. <br>
| | A peptide is when two or more [[Amino acid|amino acids]] are joined together by a [[Peptide bond|peptide bond]] to form a [[molecule|molecule]]. The peptide bond occurs between the [[Carboxyl group|carboxyl group]] of one amino acid and the [[Amino group|amino group]] of another. Peptides can join together to form [[Polypeptide|polypeptides]] which can then join together to form [[proteins|proteins]]. |
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| | | Also, see [[Peptide hormone|peptide]]. |
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| References
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| Zealandpharma. What are Peptides. n.d. [cited 14/11/2016] Available from : http://zealandpharma.com/research-and-development/key-zealand-peptide-competences/what-are-peptides<br>
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Latest revision as of 17:26, 19 November 2017
A peptide is when two or more amino acids are joined together by a peptide bond to form a molecule. The peptide bond occurs between the carboxyl group of one amino acid and the amino group of another. Peptides can join together to form polypeptides which can then join together to form proteins.
Also, see peptide.