Unconjugated

Recombinant

E. coli

Human

Store at −20 °C, though stable at room temperature for 3 weeks. Reconstituted protein solution can be stored at 4-7 °C for 2-7 days. Aliquots of reconstituted samples are stable at −20 °C for 3 months.

ED50 is less than 2 ng/ml as determined by the dosedependent stimulation of TF1 cells.
Specific Activity of 5.0 x 106 IU/mg.

B cell growth factor 1

P05112 (Human)

IL4

>95% as determined by reducing SDS-PAGE.

MHKCDITLQEIIKTLNSLTEQKTLCTELTVTDIFAASKNTTEKETFCRAATVLRQFYSHHEKDTR CLGATAQQFHRHKQLIRFLKRLDRNLWGLAGLNSCPVKEANQSTLENFLERLKTIMREKYSKCSS

Lyophilized from a 0.2 um filtered solution of 20mM PB, 150mM NaCl, pH 7.4.

SDS-PAGE , FuncS