| A | B |
|---|
| precursor for tyrosine | phenylalanine |
| Precursor for lysine, threonine, methionine | Aspartate |
| precursor for isoleucine | threonine |
| Precursors are ATP and PRPP | histidine |
| essential or non essential?: alanine | nonessential |
| essential or non essential? arginine | nonessential |
| essential or non essential? asparagine | nonessential |
| essential or non essential? cysteine | nonessential |
| essential or non essential? glutamine | nonessential |
| essential or non essential? glycine | nonessential |
| essential or non essential?serine | nonessential |
| essential or non essential? tyrosine | nonessential |
| essential or non essential? histidine | essential |
| essential or non essential?leucine | essential |
| essential or non essential? lysine | essential |
| essential or non essential? methionine | essential |
| essential or non essential? tryptophan | essential |
| essential or non essential? valine | essential |
| made from from keto acids by transaminases | Alanine and aspartate |
| made by ATP amidation using glutamine | Asparagine |
| synthesized from 3-phosphoglycerate | Serine |
| serine is the precursor for these two amino acids | Glycine and Cysteine |
| Glutamine is the precursor for these two amino acids | Proline and Arginine |
