... resulting in an approximately seven-fold increase in the total amino acid content. The expression of the AS gene, encoding a transaminaseresponsible for the synthesis of asparagine from aspar-tate ... Hanzawa Y, Akiyama T, Tamaoki M, Saji H, Shirano Y,Kato T, Hayashi H, Shibata D, Tabata S, Komeda Y, Takahashi T: Spermidinesynthase genes are essential for survival of Arabidopsis. Plant Physiol2004, ... Imai A, Akiyama T, Kato T, Sato S, Tabata S, Yamamoto KT, Takahashi T:Spermine is not essential for survival of Arabidopsis. FEBS Letters 2004,556:148-152.39. Imai A, Matsuyama T, Hanzawa...