Fig. 6. Whole-blood amino acid levels in gyrate atrophy. The level of ornithine is ten times normal. There are decreases in the levels of lysine, glutamate, and glutamine. A. Basic. (ORN, ornithine; LYS, lysine; HIS, histidine; ARG, arginine) B. Acidic and neutral. (TAU, taurine; THR, threonine; SER, serine; GLU, glutamate; ASN, asparagine; GLN, glutamine; PRO, proline; CIT, citrulline; GLY, glycine; ALA, alanine; ABA, α-amino-n-butyrate; VAL, valine; ILE, isoleucine; LEU, leucine; TYR, tyrosine; PHE, phenylalanine)