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白介素11(人类,rDNA衍生)WHO参考试剂
  【编号】:NIBSC92/788

  【名称】:白介素11(人类,rDNA衍生)WHO参考试剂

  【规格】:个

  【价格】:2600元

  白介素11(人类,rDNA衍生)WHO参考试剂

  编号:NIBSC92/788
  英文:Interleukin-11 (Human, rDNA derived) WHO Reference Reagent
  标准类型:国际参考试剂
  规格:1个 
  描述:1. INTENDED USE
This Standard is the primary biological standard for IL-11.
2. CAUTION
This preparation is not for administration to humans or animals in
the human food chain.
The preparation contains material of human origin, and either the final
product or the source materials, from which it is derived, have been
tested and found negative for HBsAg, anti-HIV and HCV RNA. As with
all materials of biological origin, this preparation should be regarded as
potentially hazardous to health. It should be used and discarded
according to your own laboratory's safety procedures. Such safety
procedures should include the wearing of protective gloves and
avoiding the generation of aerosols. Care should be exercised in
opening ampoules or vials, to avoid cuts.
3. UNITAGE
The assigned potency is 5000 Units of biological activity per
ampoule.
4. CONTENTS
Country of origin of biological material: United Kingdom.
Each ampoule contains a freeze dried residue comprising, under an
atmosphere of nitrogen:
IL-11 approximately 500 ng
Potassium phosphate buffer
2.0 mg trehalose
5.0 mg human serum albumin
The IL-11 protein was expressed in E.coli.
5. STORAGE
For economy of use, it is recommended that the solution be sub divided
into several small aliquots and stored at -40ºC or below. Avoid repeated
thawing/freezing. Unopened ampoules should be stored at -20ºC.
Please note: because of the inherent stability of lyophilized
material, NIBSC may ship these materials at ambient temperature.
6. DIRECTIONS FOR OPENING
DIN ampoules have an 'easy-open' coloured stress point, where the
narrow ampoule stem joins the wider ampoule body. Various types of
ampoule breaker are available commercially. To open the ampoule,
tap the ampoule gently to collect material at the bottom (labelled) end
and follow manufactures instructions provided with the ampoule
breaker.
7. USE OF MATERIAL
No attempt should be made to weigh out any portion of the freeze-dried
material prior to reconstitution
Dissolve the total contents of the ampoule in 0.5ml of sterile distilled
water. Rinse the ampoule with about 0.4ml of sterile distilled water and
make up the total volume to 1.0ml with distilled water. This solution will
contain IL-11 concentration of 5000 Units/ml. Use carrier protein where
extensive dilution is required.
8. STABILITY
Reference materials are held at NIBSC within assured, temperaturecontrolled
storage facilities and they should be stored on receipt as indicated on the label. It is the policy of WHO not to assign an expiry date
to their international reference materials. Accelerated degradation studies
have indicated that this material is suitably stable, when stored at -20ºC
or below, for the assigned values to remain valid until the material is
withdrawn or replaced. These studies have also shown that the material
is suitably stable for shipment at ambient temperature without any effect
on the assigned values. Once reconstituted, diluted or aliquoted, users
should determine the stability of the material according to their own
method of preparation, storage and use. Users who have data
supporting any deterioration in the characteristics of any reference
preparation are encouraged to contact NIBSC.
9. REFERENCES
This standard was produced under WHO guidelines cited in the WHO
Technical Reports Series, No. 800, 1990, Annex 4.
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