What do you think is happening to the
- Slides: 14
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 – NH 2 ►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 –NH 2 and a carboxyl group --COOH
Hydrolysis ► Dipeptide + water = amino acid + amino acid ► Tripeptide + 2 water molecules = 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?
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