in vitro incubations of tumor cells in the presence of glutamine and/or glucose , as the energy and nitrogen sources , confirmed the amino acid fluxes previously deduced from the observed relative concentrations of amino acids in plasma , ascitic liquid , and tumor cells , suggesting that glutamate , alanine , aspartate , glycine , and serine can be produced by tumors .
C0002520
amino acids
C0001898
alanine