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  • I2526 - Insulin-like Growth Factor-II human

I2526 Sigma-Aldrich

Insulin-like Growth Factor-II human

IGF-II, recombinant, expressed in E. coli, lyophilized powder, suitable for cell culture

Synonym: IGF-II



Related Categories Cell Biology, Cell Culture, Cell Signaling and Neuroscience, Cytokines and Growth Factors, Cytokines, Growth Factors and Chemokines for Stem Cell Differentiation,
Quality Level   200
biological source   human
recombinant   expressed in E. coli
assay   ≥98% (SDS-PAGE and HPLC)
form   lyophilized powder
potency   ≤2.0 ng/mL ED50
quality   endotoxin tested
mol wt   7.5 kDa
packaging   pkg of 5X50 μg
  pkg of 50 μg
application(s)   cell culture | mammalian: suitable
impurities   ≤0.1 EU/μg
UniProt accession no.   P01344
storage temp.   −20°C
Gene Information   human ... IGF2(3481)


Biochem/physiol Actions

Insulin-like growth factor II (IGF-II) also known as multiplication stimulating activity (MSA), shows virtually identical bioactivities as IGF-I. Expression of IGF-II is highest in fetal tissues, where it is believed to play a major role in overall growth and development. After birth IGF-II expression decreases to much lower levels in a variety of tissues. IGF-II is produced also in several tumors. IGF-II binds to IGF-II receptor (IGF-IIR), to IGF-IR and weakly to the insulin receptor (IR). All IGF-II bioactivities in adult tissues are generally attributed to its interaction with IGF-IR. However, during embryogenesis the roles of both IGF-IIR and IR may be significant in promoting normal growth.

Physical form

Lyophilized from a 0.2 μm filtered solution with no additives.

Analysis Note

The biological activity is measured by a cell proliferation assay using mouse FDC-P1

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles


Insulin-like Growth Factors (IGF)

Insulin-like growth factors (IGF-I and IGF-II) are mitogenic and anabolic peptides structurally homologous to insulin. IGF-I and -II are single polypeptide chains of approximately 7.5 kDa comprised o...
Jennifer Fries
BioFiles 2009, 4.5, 12.
Keywords: Adhesion, Apoptosis, Biofiles, Cancer, Growth factors, Hormones, Infrared spectroscopy, Ligands, Transduction, transformation

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Cell Culture Troubleshooting Guide

Cell culture has become one of the most fundamental techniques for modeling biological systems, and is of increasing importance in the biotechnology and pharmaceutical sectors as well as an essential...
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Peer-Reviewed Papers


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92210 Timestrip Plus 0 °C
06693 Timestrip Plus -20 °C

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