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I have read in books that Proteins and Peptides are fundamental components of cells which carryout important biological functions.Can any one explain me the structural difference between Proteins and Peptides?

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    $\begingroup$ Welcome to SE Biology. Have you tried to research this yourself? You should do this before posting — I am sure you will find an answer. If not, edit stating what you have found and why you are still unclear on the topic. See our help on asking good questions. $\endgroup$ – David Aug 24 at 10:11
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    $\begingroup$ You need to ask about this on meta, if it will allow you. Then one of the mods will explain the situation to you. @theforestecologist is better placed than me as he is a moderator (the diamond indicates this) but you need the ampersand to alert anyone to a post. He should see the one I have included. $\endgroup$ – David Nov 21 at 16:20
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    $\begingroup$ OK, the "homework questions..." is a close option that is often used when one thinks the question shows insufficient research. If you look at the Help on asking questions, it says "search, and research". This question is really basic in relation to the definition of this site as being for "for biology researchers, academics, and students", so you would be expected to search on the internet on sites like Wikipedia or NCBI bookshelf. $\endgroup$ – David Nov 21 at 17:14
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In terms of structure: both are composed of amino acids.

A peptide is when at least two amino acid are linked together. A protein is composed of multiple amino acids and have a secondary, tertiary and even quaternary structure.

In terms of function: larger molecules have more complex functions.

Peptides can act as a intracellular or extracellular ligands which will activate a signal.

Proteins have a large array of functions (enzymatic, structural, receptors etc)

This article explains in more details the differences in proteins structure and functions:https://en.wikibooks.org/wiki/Structural_Biochemistry/Proteins

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  • $\begingroup$ pls include pictures :) $\endgroup$ – shigeta Nov 15 at 17:11

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