BIOCHEMISTRY REVIEW 

Overview of Biomolecules

Chapter 3

Peptides

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Ala-Gly-Tyr-Gln-Ser-Phe-Lys

N-terminal C-terminal

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Are You Getting It??________________________________________________________________________________________________________

a) How many amino acids are in this peptide?b) How many pKa values does this peptide have? (include serine)c) What is the charge at pH = 1?d) What is the charge at pH = 14?

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Are You Getting It??__________________________________________________________________________Answer________________________

a) How many amino acids are in this peptide? 5b) How many pKa values does this peptide have? (include serine) 4c) What is the charge at pH = 1? +1d) What is the charge at pH = 14? -3

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Are You Getting It??________________________________________________________________________________________________________

Ala-Gly-Lys-Gln-Arg-Phe-Asp

a) How many peptide bonds are in this peptide?b) How many pKa values does this peptide have?c) What is the charge at pH = 1?d) What is the charge at pH = 14?

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Are You Getting It??__________________________________________________________________________Answer________________________

Ala-Gly-Lys-Gln-Arg-Phe-Asp

a) How many peptide bonds are in this peptide? 6b) How many pKa values does this peptide have? 5c) What is the charge at pH = 1? + 3d) What is the charge at pH = 14? -2

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