Control of the levels of free amino acids in plasma by the liver.
D000596:Amino Acids / Q000097:blood* / Q000378:metabolism; D000818:Animals; D007930:Leucine / Q000378:metabolism*; D008099:Liver / Q000378:metabolism*; D010477:Perfusion; D051381:Rats; D014633:Valine / Q000378:metabolism*
D000596:Amino Acids; D007930:Leucine; D014633:Valine