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Sigma-Aldrich

B18R, Human Recombinant Carrier-Free

B18R protein can be used with the Simplicon® RNA Reprogramming Technology (Catalog No. SCR550) to create “foot-print” free human iPS cells at the highest efficiency without unwanted RNA degradation caused by cellular IFN responses.

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eCl@ss:
32160405
NACRES:
NA.75

biological source

human

Quality Level

100

Assay

>98% (SDS-PAGE)

form

liquid

mol wt

Mw 38,389 Da

concentration

0.5 mg/mL

technique(s)

cell culture | stem cell: suitable

impurities

<0.05 ng/μg cytokine (LAL test)

input

sample type induced pluripotent stem cell(s)

shipped in

dry ice

General description

B18R is a virally-encoded protein that acts as a decoy receptor for Type 1 Interferons. B18R enables increased cell viability during RNA transfection protocols designed to convert human somatic donor cells into iPSCs via direct delivery of synthetic mRNA′s. As a type I IFN receptor, B18R has a broad species specificity. It has high affinity for human IFN-alpha and also binds rabbit, bovine, rat, pig, and mouse IFN-alpha and IFN-beta.
Product Source: Insect cells infected with baculovirus: amino acids His20-Glu 351 with a His-tag attached of Vaccinia Virus B18R.

Application

Research Category
Stem Cell Research

Physical form

Sterile liquid;10 mM phosphate, 0.5 M NaCl, pH 7.5 buffer and is filtered with a 0.2µm filter before vialing.

Storage and Stability

For best recovery, quick-spin vial prior to opening. Thaw on ice. While on ice, aliquot B18R protein into sterile, nuclease-free, low protein-binding eppendorf tubes and store at -80°C. Limit repeated freeze and thaw cycle. Use in a sterile environment.
Further dilutions should be made into appropriate buffer or medium.

Analysis Note

The DTT-reduced protein migrates as a 48 kDa polypeptide on SDS-PAGE due to glycosylation. The non-reduced protein migrates as a 46 kDa polypeptide on SDS-PAGE due to internal cystines.

Legal Information

SIMPLICON is a registered trademark of Merck KGaA, Darmstadt, Germany

Disclaimer

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Storage Class Code

12 - Non Combustible Liquids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Irene L Llorente et al.
Stem cell research, 55, 102458-102458 (2021-07-19)
White matter stroke (WMS) occurs as small infarcts in deep penetrating blood vessels in the brain and affects the regions of the brain that carry connections, termed the subcortical white matter. WMS progresses over years and has devastating clinical consequences.

Articles

Single Transfection of a Synthetic Polycistronic Self-replicative RNA Yields High Numbers of Transgene-free Human iPSCs

The Simplicon™ RNA Reprogramming Technology is a next generation reprogramming system that uses a single synthetic, polycistronic self-replicating RNA strand engineered to mimic cellular RNA to generate human iPS cells.

Protocols

Induced Pluripotent Stem Cell Reprogramming Protocols

Stem cell reprogramming protocols to generate human induced pluripotent stem cells (iPSCs) including viral and non-viral RNA based methods.

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