Cat Number: GMP-101-15

rHuIL-15 GMP

Inquiry

Source

Escherichia coli

Purity

> 98% by SDS-PAGE and HPLC analyses.

Molecular Weight

Approximately 12.9 kDa, a single non-glycosylated polypeptide chain containing 114 amino acids.

Sequence

NWVNVISDLK KIEDLIQSMH IDATLYTESD VHPSCKVTAM KCFLLELQVI SLESGDASIH DTVENLIILA NNSLSSNGNV TESGCKECEE LEEKNIKEFL QSFVHIVQMF INTS

Biological Activity

Measured in a cell proliferation assay using MO7e human megakaryocytic leukemic cells. The ED50 for this effect is 0.30-2.60 ng/mL. The specific activity of recombinant human IL-15 is > 1.50 × 108 Units/mg, which is calibrated against rHuIL-15 WHO reference reagnt (NIBSC code: 95/554).

Appearance

Sterile filtered white lyophilized (freeze-dried) powder.

Formulation

Lyophilized from a 0.2 µm filtered concentrated solution in PBS, pH 7.4.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
- A minimum of 12 months from date of receipt, when stored at ≤ -20 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 3 months, -20 to -70 °C under sterile conditions after reconstitution.
- Refer to lot-specific CoA for the Expiry Date.

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Endotoxin

Less than 0.01 EU/µg of rHuIL-15 GMP as determined by LAL method.

Host Cell Protein

Less than 0.05% when tested by ELISA.

Host Cell DNA

Less than 20 ng/mg when tested by qPCR.

Reconstitution

Prior to opening, it is recommended to centrifuge the vial briefly to bring the contents down the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1.0 mg/mL. If animal-origin-free condition is expected in your product, then sterile distilled water is recommended. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.

Usage

This material is offered by Shanghai PrimeGene Bio-Tech for research, laboratory, or further evaluation purposes. NOT FOR HUMAN USE.

Quality Statement

The manufacturing and testing of these products comply with ICH Q7 guidelines.

Sterility

Negative

Mycoplasma

Negative

In Vitro Virus Assay

Negative

Standard

5μg, 100μg

Background

Human Interleukin-15 (IL-15) is expressed by the IL15 gene located on the chromosome 4. It shares approximately 97% and 73% sequence identity with simian and murine IL-15, respectively. Both human and simian IL-15 are active on murine cells. IL-15 is secreted by mononuclear phagocytes (and some other cells), especially macrophages following infection by virus. It possesses a variety of biological functions, including stimulating and maintaining of cellular immune responses, especially regulating T and natural killer (NK) cell activation and proliferation. In additionally, it shares many biological properties with IL-2, including T, B and NK cell-stimulatory activities. IL-15 signals through a complex composed of IL-2/IL-15 receptor beta chain. Although IL-15 lacks sequence homology with IL-2, it has recently been shown that both the beta and gamma chains of the IL-2 receptor are utilized for IL-15 binding and signaling. In addition, an IL-15 specific binding protein has also been cloned from a mouse T cell clone.