among 14 amino acids measured in plasma of these patients , the concentrations of alanine , serine , ornithine , and arginine were significantly ( p < 0.05 ) elevated to approximately twice that of normal : alanine and serine are both substrates for gluconeogenesis , whereas ornithine and arginine are involved in the formation of urea , the second product of hepatic gluconeogenesis .
C0002520
amino acids
C0001898
alanine