英文名稱：Recombinant Human Interleukin-3
中文簡稱：【IL 3 】重組人白介素-3

Recombinant Human Interleukin-3 【IL 3 】重組人白介素-3 細胞因子產(chǎn)品描述：

人白介素-3重組蛋白促進細胞因子是一個強有力的增長。這種細胞因子能夠支持廣泛的造血細胞的增殖。它是參與多種細胞活動,如細胞生長、分化和凋亡。這種細胞因子也具有神經(jīng)營養(yǎng)活性,而且它可能與神經(jīng)系統(tǒng)疾病有關。

人白介素-3重組蛋白是在大腸桿菌中重組表達的，是一條單鏈、非糖基化的多肽鏈，包含有133個氨基酸，分子量為15000Da。該人白介素-3重組蛋白最終由標準的色譜技術純化出。
來源宿主---大腸桿菌中重組表達

Recombinant Human Interleukin-3 【IL 3 】重組人白介素-3  細胞因子產(chǎn)品實驗須知：

溶解：提供的人白介素-3(IL 3)產(chǎn)品為過濾滅菌的白色凍干粉末；該凍干粉末是從含1mg/ml人白介素-3(IL 3)的0.3 mg/ml NaHCO3 溶液中凍干產(chǎn)生的。我們建議加無菌的18MΩ-cm水以配制工作儲存液到100ug/ml，后繼實驗過程中可根據(jù)實驗要求進一步稀釋。
保存：人白介素-3(IL 3 )凍干粉末在室溫可保存3周，或置于-18℃凍存用于長期保存。重新溶解后可以在4℃冷藏保存至少2-7天；如果想延長保存時間，建議分裝后置于-18℃凍存。請避免反復凍融。

Recombinant Human Interleukin-3 【IL 3 】重組人白介素-3  細胞因子產(chǎn)品英文描述：

Synonyms 

MCGF (Mast cell growth factor), Multi-CSF, HCGF, P-cell stimulation factor, IL-3, MGC79398, MGC79399.

Introduction 

IL3 is a potent growth promoting cytokine. This cytokine is capable of supporting the proliferation of a broad range of hematopoietic cell types. It is involved in a variety of cell activities such as cell growth, differentiation and apoptosis. This cytokine has been shown to also possess neurotrophic activity, and it may be associated with neurologic disorders.
Description  Interleukin-3 Human Recombinant produced in E.Coli is a single, non-glycosylated polypeptide chain containing 133 amino acids and having a molecular mass of 15000 Dalton. The IL-3 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 0.3 mg/ml of NaHCO3.

Solubility 

It is recommended to reconstitute the lyophilized Interleukin-3 in sterile 18MΩ-cm H2O not less than 100µg/ml, which can then be further diluted to other aqueous solutions.

Stability  （穩(wěn)定性）

Lyophilized Interleukin-3 although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution IL3 should be stored at 4°C between 2-7 days and for future use below -18°C.
Please prevent freeze-thaw cycles.

Purity  （純度）

Greater than 98.0% as determined by:
(a) Analysis by SEC-HPLC.
(b) Analysis by SDS-PAGE.

Amino acid sequence  （氨基酸序列）

The sequence of the first five N-terminal amino acids was determined and was found to be Ala-Pro-Met-Thr-Gln.
Biological Activity  The ED50 as determined by the dose-dependant stimulation of TF-1 cells is < 0.1 ng/ml, corresponding to a Specific Activity of 10,000,000 IU/mg.
Protein content  Protein quantitation was carried out by two independent methods:
1. UV spectroscopy at 280 nm using the absorbency value of 0.84 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 (IntelliGenetics).
2. Analysis by RP-HPLC, using a standard solution of IL-3 as a Reference Standard.