What do you think is happening to the proteins within these eggs???? !

Organic Compounds Proteins

Proteins C, H, O, N Made in ribosomes Cell membranes Hormones (insulin) Hemoglobin Enzymes (control the rate of reactions)

Building Blocks of Proteins Amino Acids Amino Group –NH2 Carboxyl group –COOH Variable group –R

Dehydration Synthesis of Proteins Removal of a water molecule from amino acids to make proteins. Dipeptide – two amino acids together Tripeptide – three amino acids together Polypeptide – more than three amino acids together All linked together with “Peptide Bonds”

Dehydration Synthesis of Proteins Amino Acid + Amino Acid -- Dipeptide + Water

Removing the water molecule Producing a peptide bond

Dehydration Synthesis of Proteins

Dipeptide Locate your peptide bond!!!

Can you draw a peptide bond? Which two functional groups join to make the peptide bond???

How do we break proteins down?? HYDROLYSIS Add the water molecule back in to replace the peptide bond Put the amino acids back to the way they were!!! Each amino acid must have an amino group –NH2 and a carboxyl group --COOH

Hydrolysis NOW YOU TRY…… Dipeptide + water = amino acid + amino acid Tripeptide + 2 water molecules = amino acid + amino acid + amino acid NOW YOU TRY……

Hydrolysis of Proteins

Hydrolysis is the OPPOSITE of dehydration synthesis What reaction is this? Can you locate the peptide bond?