AQA Jun 2010 Paper 4 Q6

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a consider the tripeptide shown below that is formed from three amino acids k l and m do not write outside the box h n ch co nh ch ch ch nh co nh cooh from k from l from m a i name the process by which the tripeptide is split into three amino acids mark a ii give the iupac name for the amino acid k mark a iii draw the structure of the zwitterion of amino acid l a iv draw the structure of the species formed by amino acid m at low ph mark mark wmp jun chem b consider the amino acid serine do not write outside the box h n cooh ch oh b i draw the structure of the product formed when serine reacts with an excess of ch br b ii draw the structure of the dipeptide formed by two molecules of serine mark turn over for the next question mark turn over wmp jun chem

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