The relatively broad and overlapping specificities of amino acid transport systems have made the synthesis of analogues specific to single transport systems desirable. The analogue in general use as a specific substrate for transport system L has been 2-aminobicyclo[2.2.1]heptane-2-carboxylic acid
Our previous study shows that 6-O-acyl derivatives of L-ascorbic acid inhibits more markedly cell growth of mouse Ehrlich carcinoma than ascorbic acid. The present study shows that 6-O-palmitoyl ascorbic acid but not ascorbic acid prolongs the lifespan of mice into which tumors such as Meth A