HOMOCITRULLINE AND HOMOARGININE SYNTHESIS FROM LYSINE.
After the injection of L-lysine and uniformly labeled L-lysine-carbon-14 into the rat, labeled homocitrulline and homoarginine are found in the liver and kidney. The ingestion of lysine by seven normal adults results in an increased urinary excretion of homocitrulline and homoarginine. These data suggest the occurrence of an unreported metabolic pathway for lysine in the rat and man.
D000328:Adult; D000596:Amino Acids; D001826:Body Fluids; D002247:Carbon Isotopes; D002250:Carbon Radioisotopes; D002845:Chromatography; D002956:Citrulline / Q000031:analogs & derivatives; D006709:Homoarginine; D006801:Humans; D007668:Kidney; D008099:Liver; D008239:Lysine; D008297:Male; D011506:Proteins / Q000378:metabolism*; D051381:Rats; D012106:Research; D014556:Urine
D000596:Amino Acids; D002247:Carbon Isotopes; D002250:Carbon Radioisotopes; D011506:Proteins; C001352:homocitrulline; D006709:Homoarginine; D002956:Citrulline; D008239:Lysine
AMINO ACIDS; CARBON ISOTOPES; CHROMATOGRAPHY; EXPERIMENTAL LAB STUDY; KIDNEY; LIVER; LYSINE; PROTEIN METABOLISM; RATS; URINE