--- /dev/null
+[[!meta title="Polyamine as a growth promoter for cultured insect cells."]]
+[[!tag cell_culture]]
+
+Mitsuhashi J.
+
+In Vitro Cell Dev Biol Anim. 1998 Sep;34(8):619-21. doi:10.1007/s11626-996-0007-9
+
+Polyamine as a growth promoter for cultured insect cells.
+
+[[!pmid 9769143 desc="At least one of putrescine, spermidine and spermine at 2
+µg per 1000 ml need to be in the culture medium of NIH-SaPe-4 cells (from the
+fly _Boettcherisca peregrina_) could be passaged more than 10 times."]]