Raf-1 Protein Kinase human

recombinant, expressed in E. coli, ~20 units/mg protein

MDL number:

Quality Level


expressed in E. coli



specific activity

~20 units/mg protein

mol wt

74 kDa

relevant disease(s)


shipped in

dry ice

storage temp.


Gene Information

human ... RAF1(5894)


Raf-1 is a serine/threonine protein kinase which is involved in the MAPK signal transduction pathway, a pathway that is involved in the development and progression of cancer. Raf-1 kinases are used to study potential cancer treatments as well as the responses to cancer treatments .

Biochem/physiol Actions

Raf-1 activates the protein kinases MEK1 and MEK2. MEK1 and MEK2 are phosphorylated to activate protein kinases ERK1 and ERK2. Activated ERKs play an important role in cell division, apoptosis, cell differentiation, and cell migration .

Unit Definition

One unit will activate MEK B substrate by 10% per min at pH 7.0 at 30 °C.

Physical form

Solution in 50 mM Tris-HCl, pH 7.0 buffer containing 14 mM β-mercaptoethanol, 1 mM benzamidine, 0.1 mM PMSF, 1 mM EDTA, and 10% glycerol.


Exclamation mark

Signal Word


Hazard Statements


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
  1. How does the storage temperature relate to shipping conditions?

    The storage conditions that a Sigma-Aldrich catalog and label recommend for products are deliberately conservative. For many products, long-term storage at low temperatures will increase the time during which they are expected to remain in specification and therefore are labeled accordingly. Where short-term storage, shipping time frame, or exposure to conditions other than those recommended for long-term storage will not affect product quality, Sigma-Aldrich will ship at ambient temperature. The products sensitive to short-term exposure to conditions other than their recommended long-term storage are shipped on wet or dry ice. Ambient temperature shipping helps to control shipping costs for our customers. At any time, our customers can request wet- or dry-ice shipment, but the special handling is at customer expense if our product history indicates that the product is stable for regular shipment. See Shipping and Storage for more information.

  2. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  3. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  4. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  5. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  6. Does Product R3652, Raf-1 Protein Kinase human, contain a GST tag?

    Yes. Product R3652, Raf-1 Protein Kinase human, contains a GST tag on the amino terminal end. 

  7. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

  8. My question is not addressed here, how can I contact Technical Service for assistance?

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Raf kinase as a target for anticancer therapeutics
Sridhar SS, Hedley D, et al.
Clinical Cancer Research, 4, 677-685 (2005)
Liane M McGlynn et al.
Clinical cancer research : an official journal of the American Association for Cancer Research, 15(4), 1487-1495 (2009-02-21)
The expression and activation of the Ras/Raf-1/mitogen-activated protein kinase (MAPK) pathway plays an important role in the development and progression of cancer, and may influence response to treatments such as tamoxifen and chemotherapy. In this study we investigated whether the...

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