nonessential alanine aspartate asparagine glutamate Serine
N-acetylglutamate synthase
carbamoyl phosphate synthetase 1
ketogenic
glucogenic
Glysine
Leucine causes ketosis in starvation
biotin
tetrahydrofolate (H4 folate)
S-adenosylmethionine
biotin carbon dioxide
tetrahydrofolate