Entry Points of AA Carbon Skeletons into Major Metabolism

pyruvate

1. alanine 

2. cysteine

3. glycine

4. serine

5. threonine

6. tryptophan 

acetyl CoA

1. isoleucine

2. leucine

3. tryptophan

acetoacetyl CoA

1. leucine

2. lysine

3. phenylalanine

4. tryptophan 

5. tyrosine

alpha-ketoglutarate

1. arginine

2. glutamate

3. glutamine

4. histidine

5. proline

succinyl CoA

1. isoleucine

2. methionine

3. threonine

4. valine

fumarate

1. aspartate

2. phenylalanine

3. tyrosine

oxaloacetate

1. asparagine

2. aspartate