The compositions of branched-chain amino acids and aromatic amino acids in medium.

aBranched-chain amino acids (BCAAs) comprise three essential amino acids: valine (Val), leucine (Leu), and isoleucine (Ile). bAromatic amino acids (AAAs) contain two amino acids: tyrosine (Tyr) and phenylalanine (Phe). cFischer's ratio is defined as the molar ratio of BCAAs to AAAs.