Enzyme: Protein structure

• What is an enzyme?

  An enzyme is a protein molecule that acts as a catalyst in a biochemical reaction.
• What are is protein?

  Proteins are big molecules that do lots of important jobs in our bodies.
• What kinds of stuff are made of protein?


  like our muscles are made of protein.
• Proteins catalyse reactions ( enzyme)
• Proteins help to bind cells into tissues.
• Proteins can be antibodies which protect us from pathogens
• Proteins transport materials
• Protens can carry chemical messages (hormones)
• Proteins can carry activity of genes from one cell to another.
• What are proteins made up of?

  Proteins are made up of much smaller molecules called amino acids
• Draw Amino acid structure

  
• How does peptide bonds happen?

  By condensation reaction (water is produced) occurs between two amino acids.
• What is dipeptide?


  Two amino acids linked together by a peptide bond. For example, Glycine and Alanine
• How many different R groups (side chain ) are there in amino acids?

  There are 20 different R groups and so there are different amino acids.
• How are amino acids linked together?

  Amino acids are linked together by peptide bonds.
• What is called when two amino acids linked together?


  Dipeptide
• What is it called when three amino acids linked together?

  Tripeptide
• What is it called when there are less than 50 amino acids joined together?

  Oligopeptides
• What is it called when there is more than 50 amino acids joined together?

  Polypeptides (protein)