Trans-sulfuration in mammals. The methionine-sparing effect of cystine.
D003553:Cystine; D005492:Folic Acid; D006712:Homocystinuria; D006801:Humans; D006836:Hydro-Lyases / Q000378:metabolism*; D008099:Liver / Q000201:enzymology; D008715:Methionine / Q000378:metabolism*; D014166:Transferases / Q000378:metabolism*
D003553:Cystine; D005492:Folic Acid; D008715:Methionine; D014166:Transferases; D006836:Hydro-Lyases