On the carbon origin of isovaleric acid residue of urinary isovalthine.
D000596:Amino Acids / Q000378:metabolism*; D000818:Animals; D002244:Carbon; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008297:Male; D014556:Urine; D014631:Valerates / Q000378:metabolism*
D000596:Amino Acids; D014631:Valerates; D002244:Carbon