a serious limitation to the use of n ( o , s ) -heptafluorobutyryl isobutyl amino acid derivatives in the analysis of ( 15 ) n-labeling kinetics of amino acids in plant tissues , is that the amides glutamine and asparagine undergo acid hydrolysis to glutamate and aspartate , respectively , during derivatization .
C0002520
amino acids
C0017797
glutamine