Cell culture refers to the use of extremely fragile cell lines, separated from their original animal or vegetal tissue. They require an easily filtrable nitrogen source, free from pathogenic compounds, with a very low bioburden. We represent Organotechnie France can provide a range of low endotoxin peptones that are succesfully used in this area. For example, TRYPTONE N1 & TRYPTONE PLUS generate a better protein expression in CHO and HEK293 cell lines- Scientific references