PODS™ Human LIF
DescriptionLeukemia Inhibitory Factor (LIF) is a member of the interleukin-6 (IL-6) family that is made by a variety of adult and embryonic tissues. LIF signals through the glycoprotein 130 (gp130)/LIF receptor (LIFR) heterodimer to activate STAT3 and MAPK signaling. LIF functions during hematopoietic differentiation, neuronal cell differentiation, kidney development, and inflammatory processes. Human LIF may also be an important factor during human embryonic stem cell (hESC) self-renewal, pluripotency, and embryonic implantation.
PODS™ crystals provide a depot of proteins which are steadily secreted. It has been estimated that the biological activity of 50 million PODS™ crystals generates the same peak dose as 3.3 μg of standard recombinant protein. However, at 5 days following the start of seeding the PODS™ crystals, there are more than 50% of these peak levels still present in the culture system. Ultimately, the amount of PODS™ crystals that is optimal for a particular experiment should be determined empirically. Based on previous data, we suggest using 50 million PODS™ crystals in place of 3.3 μg of standard growth factor as a starting point."
To control for cross-reactivity with cells or as a negative control, we recommend using PODS™ growth factors alongside PODS™ Empty crystals, as the latter do not contain or release cargo protein.
AA SequenceMADVAGTSNR DFRGREQRLF NSEQYNYNNS KNSRPSTSLY KKAGLSPLPI TPVNATCAIR HPCHNNLMNQ IRSQLAQLNG SANALFILYY TAQGEPFPNN LDKLCGPNVT DFPPFHANGT EKAKLVELYR IVVYLGTSLG NITRDQKILN PSALSLHSKL NATADILRGL LSNVLCRLCS KYHVGHVDVT YGPDTSGKDV FQKKKLGCQL LGKYKQIIAV LAQAF
Alternative NamesLeukocyte Inhibitory Factor, leukemia inhibitory factor, cholinergic differentiation factor
|Molecular Weight||25 kDa|
|Source||Spodoptera frugiperda (Sf9) cell culture|
|Endotoxin Level||<0.06 EU/ml as measured by gel clot LAL assay|
|Formulation||PODS™ were lyophilized from a volatile solution|
PODS™ protein crystals may be reconstituted at 200 million PODS™/ml in water. 20% glucose has a buoyant density closer to PODS™ protein crystals and can be useful for aliquoting.
PODS™ protein crystals are highly stable when stored in aqueous solution (pH range 6 - 8).
|Stability and Storage||Upon receipt, store at 4°C. PODS™ protein crystals are stable for at least 1 year when dry and 6 months when resuspended.|