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IL 4 Rat
  • IL 4 Rat
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貨物所在地：福建廈門市

更新時(shí)間：2024-11-24 21:00:06

瀏覽次數(shù)：220

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IL 4 Rat
產(chǎn)品編號：CYT-385
產(chǎn)品規(guī)格：2μg/10μg/1mg

Synonyms BCGF, BCDF, B cell stimulating factor, BSF-1, Lymphocyte stimulatory factor 1, IL-4, MGC79402, Binetrakin, Pitrakinra.
Introductionn IL4 is a pleiotropic cytokine produced by activated T cells. IL4 is a ligand for interleukin 4 receptor. The interleukin 4 receptor also binds to IL13, which may contribute to many overlapping functions of this cytokine and IL13. STAT6, a signal transducer and activator of transcription, has been shown to play a central role in mediating the immune regulatory signal of this cytokine. This gene, IL3, IL5, IL13, and CSF2 form a cytokine gene cluster on chromosome 5q, with this gene particularly close to IL13. IL4, IL13 and IL5 are found to be regulated coordinay by several long-range regulatory elements in an over 120 kilobase range on the chromosome. Two alternatively spliced transcript variants of this gene encoding distinct isoforms have been reported.
Description Interleukin-4 Rat Recombinant produced in E.Coli is a single, non-glycosylated polypeptide chain containing 126 amino acids and having a molecular mass of 14105 Dalton.
The IL-4 is purified by proprietary chromatographic techniques.
Source Escherichia Coli.
Physical Appearance Sterile Filtered White lyophilized （freeze-dried） powder.
Formulation Lyophilized from a concentrated （1mg/ml） solution in water containing no additives.
Solubility It is recommended to reconstitute the lyophilized Interleukin 4 in sterile 18MΩ-cm H2O not less than 100μg/ml, which can then be further diluted to other aqueous solutions.
Stability Lyophilized Interleukin-4 although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution IL4 should be stored at 4°C between 2-7 days and for future use below -18°C.
For long term storage it is recommended to add a carrier protein （0.1% HSA or BSA）.
Please prevent freeze-thaw cycles.
Purity Greater than 98.0% as determined by（a） Analysis by RP-HPLC.
（b） Analysis by SDS-PAGE.
Amino acid sequence The sequence of the first five N-terminal amino acids was determined and was found to be Met-His-Gly-Cys-Asn.
Biological Activity The ED50 as determined by the dose-dependant prolifiration of Con A activated rat spleen cells is < 1.5 ng/ml, corresponding to a Specific Activity of 6.6 x 105 IU/mg.
Protein content Protein quantitation was carried out by two independent methods1. UV spectroscopy at 280 nm using the absorbency

value of 0.2 as the extinction coefficient for a 0.1% （1mg/ml） solution. This value is calculated by the PC GENE computer analysis program of protein sequences （InliGenetics）.

2. Analysis by RP-HPLC, using a standard solution of IL-4 as a Reference Standard.
Usage ProSpec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.

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