Fig 17'8 Biosynthesis of amino acids

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Fig 17.8 Biosynthesis of amino acids
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Table 17.1
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A. Alanine, Asparagine, Aspartate, Glutamate and
Glutamine

• Pyruvate is the amino-group acceptor in alanine
  synthesis

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Oxaloacetate is the amino-group acceptor in the
synthesis of aspartate
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Synthesis of asparagine
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B. Serine, Gycine, and Cysteine

• Fig 17.9 Serine is derived from the glycolytic
  intermediate 3-phosphoglycerate

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Fig 17.9 (continued)
(from previous slide)
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Fig 17.10 Biosynthesis of glycine
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Fig 17.11

• Compounds formedfrom serine and glycine

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Fig 17.12

• Cysteine biosynthesis from serine in bacteria,
  plants

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Fig 17.13 Cysteine biosynthesis in mammals
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17.5 Synthesis of Essential Amino Acids

• Pathways have largely been determined from
  studies with bacteria
• Plants are thought to synthesize essential amino
  acids by similar pathways

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D. Tyrosine
Fig 17.15
(continued next slide)