Recombinant Human Hrk Western Blot Standard Protein

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R&D Systems Recombinant Proteins and Enzymes
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Recombinant Human Hrk Western Blot Standard Protein Summary

Product Specifications

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Store the unopened product at -20 to -70 °C. Use a manual defrost freezer and avoid repeated freeze-thaw cycles. Do not use past expiration date.
Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Background: Hrk

HRK (harakiri) is a 10 kDa pro-apoptotic member of the Bcl-2 family of apoptosis regulatory proteins. Hrk lacks significant homology to other Bcl-2 family members except for an 8-amino acid region that is similar to the BH3 domain of Bik (Bcl-2-interacting Killer). Hrk physically interacts with Bcl-2 and Bcl-xL, but not with the pro-apoptotic Bax, BAK, or Bcl-xS. Hrk regulates apoptosis by interacting selectively with survival-promoting Bcl-2 and Bcl-xL to induce cell death.

Long Name
Entrez Gene IDs
8739 (Human)
Alternate Names
activator of apoptosis harakiri; activator of apoptosis Hrk; BCL2-interacting protein; BH3-interacting domain-containing protein 3; BID3; death protein 5; DP5; HARAKIRI; harakiri, BCL2 interacting protein (contains only BH3 domain); harakiri, BCL2-interacting protein (contains only BH3 domain); Hrk; Neuronal death protein DP5


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