User:Stephen Mills/XU Peptide Tutorial 1 p1

From Proteopedia

Biochemistry Tutorial #1 - Peptides Pt. 1

The alpha amino acids polymerize, or bond, through the elimination of a water molecule. Polymers composed of two amino acid residues are known as dipeptides. Longer polymers are called oligopeptides (up to around 20 amino acids) or polypeptides (> 20 amino acids). Proteins can contain any number of amino acids linked together but each has a unique length (number of amino acids) and sequence (the identity and order of amino acids in the polymer).

In this excercise, you will identify amino acids, the amino and carboxy groups involved in the peptide bond, look at peptide bonds and oligopeptide structure and finally also examine disulfide bonds.

Which amino acid is this?

Click here to find out which amino acid it is.

Note: in these tutorials, the images are 3D interactive images. You can manipulate them as you wish to get a better view of the molecules.

You can rotate the amino acid by holding down the right mouse button and dragging.

Other things you can do:

To rotate: left drag

To Zoom: scroll button or shift + left drag

To Translate: ctrl + right drag

Right click to bring up an options menu