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R2520

Sigma-Aldrich

Ribonuclease inhibitor human

Inhibits ribonucleases during transcription and translation experiments

Synonym(s):

RNase Inhibitor, Ribonuclease Inhibitor

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About This Item

MDL number:
UNSPSC Code:
12352200
NACRES:
NA.52

biological source

human placenta

Quality Level

grade

for molecular biology

form

buffered aqueous solution

mol wt

~50 kDa

concentration

30,000-50,000 units/mL

shipped in

dry ice

storage temp.

−20°C

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General description

Ribonuclease inhibitor works to inhibit RNase activity by forming a tight, non-covalent 1:1 complex. It is human placenta. It inhibits RNases A, B, and C. It will not inhibit RNases H, 1, T1, S1 Nuclease, SP6, T7 RNA Polymerase, T3 RNA Polymerase, AMV Reverse Transcriptase, M-MLV Reverse Transcriptase, or Taq Polymerase. The inhibitor can be removed by phenol extraction or by heating to 65°C for 10 minutes.

Application

Suitable for use in
  • in vitro inhibition of ribonucleases
  • cDNA synthesis
  • RT-PCR
  • in vitro transcription and translation
Useful for in vitro inhibition of ribonucleases, including procedures like cDNA synthesis, RT-PCR, and in vitro transcription and translation.

Biochem/physiol Actions

Inhibits RNase by forming a tight, non-covalent 1:1 complex. Also inhibits angiogenin, a neovascularization promoter which is homologous with RNase A.

Components

Ribonuclease Inhibitor is provided as a solution in 20 mM HEPES-KOH( pH 7.6), 50 mM KCl, 8 mM DTT and 50% glycerol.

Other Notes

This inhibitor of RNase activity is isolated from human placenta and supplied as a buffered aqueous glycerol solution.
Solution in 50% glycerol, 20 mM HEPES-KOH, pH 7.6, 50 mM KCl and 8 mM DTT

Unit Definition

One unit will reduce the activity of 5 ng of ribonuclease A by 50% in a cytidine 2′:3′-cyclic monophosphate system.

Physical form

Solution in 50% glycerol, 20 mM HEPES-KOH, pH 7.6, 50 mM KCl and 8 mM DTT

replaced by

Storage Class Code

12 - Non Combustible Liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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Ribonuclease inhibitor from human placenta: interaction with derivatives of ribonuclease A.
P Blackburn et al.
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