description
Serine is derived from 3-phospho-D-glycerate, an intermediate of glycolysis [MD:M00020], and glycine is derived from serine. Threonine is an essential amino acid, which animals cannot synthesize. In bacteria and plants, threonine is derived from aspartate [MD:M00018]

external resources
NCBI:82949
KEGG:hsa00260
PUBMED:7639721
PUBMED:15520012
PUBMED:11823218
PUBMED:15470257
PUBMED:10473374
PUBMED:16707670
PUBMED:17636255
PUBMED:11341914

genes
AGXT , ALAS1 , ALAS2 , AMT , AOC2 , ALDH7A1 , BHMT , BPGM , CBS , CTH , DAO , DLD , SARDH , GAMT , GATM , GCSH , GLDC , MAOA , MAOB , PGAM1 , PGAM2 , PSPH , SHMT1 , SHMT2 , AOC3 , GRHPR , SDS , GCAT , PHGDH , GNMT , DMGDH , PSAT1 , PIPOX , CHDH , SRR , AGXT2 , SDSL , GLYCTK , PGAM4 ,