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User:Stephen Mills/Peptide tutorial 1
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Biochemistry Tutorial #1 - Peptides
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?
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Scroll down when you know what it is.
You can rotate the amino acid by holding down the right mouse button and dragging.
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This is Arginine (Arg, R) and amino acid with a positively charged side chain.
Identify the α-amino and α-carboxy groups involved in peptide bond formation.
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Name the new amino acid.
Scroll down to get the answer
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This is Tyrosine (Tyr, Y), an aromatic amino acid
Again, identify the amino and carboxy groups involved in peptide bond formation.
Click to have the N and C groups labeled.
