1.5 Proteins

1.5 Proteins

What forms a Protein?

• Monomers of proteins are amino acids.
• Dipeptide is formed when two amino acids join.
• Polypeptide forms when more than two amino acids join.
• Proteins are made of one or more polypeptides.

Amino Acid Strucutre

• All amino acids conntain the same carboxyl group (-COOH), an amine group (-NH2) & a carbon containing R-group (variable group).
• Except glycine that has only a hydrogen atom in it's R-group.

• All organisms share the same bank of 20 diffferent amino acids.
• The only difference between each amino acid is the R-group.

Dipeptide & Polypeptide Formation

• Amino acids linked by condensation reactions, a water molecule…