The 1 May issue of GEN features an article about cost-saving alternatives for labelled protein production in its bioprocessing turorial. Utilozing the DAGIP fermentation system, the FMP lab developed a new process to first raise cell numbers and before starting labeled feed for protein expression.
more info: http://www.dasgip.de/engl/prozess/service/blaetter/pdf//DASGIP_GEN_Proteinexpression_2007_05