By depriving the cancer cells of the amino acid
cystine, the researchers were able to trigger a form of cell death
called necrosis in mouse models of the disease.
Of the twenty amino acids needed for proper construction, eight are
called essential amino acids for adults, nine for children, since the body can not synthesize or make these for itself: histidine, isoleucine, leucine, lysine, methionine (which becomes
cystine), phenylalanine (which becomes tyrosine), threonine, tryptophan, and valine.