label: alanine / arginine / aspartate / glucose / glutamate / glycine / histidine / isoleucine / leucine / lysine / methionine / N-acetyltyrosine / phenylalanine / proline / serine / threonine / tryptophan / valine
label_lc: alanine / arginine / aspartate / glucose / glutamate / glycine / histidine / isoleucine / leucine / lysine / methionine / n-acetyltyrosine / phenylalanine / proline / serine / threonine / tryptophan / valine