IL-4 Protein, Rat (CHO, His)

IL-4 Protein, Rat (CHO,His) is a potent CHO cell derived lymphoid cell growth factor, which stimulates the growth and survivability of B-cells and T-cells.

Interleukin-4 (IL-4) is a cytokine that plays an important role in regulating inflammation and immune responses. It induces the differentiation of naïve helper T cells to Th2 cells. This cytokine binds the IL-4 receptor that also binds another cytokine interleukin 13 (IL-13), which may explain the overlapping functions of IL-4 and IL-13. IL-4, originally designated as B-cell growth factor-1 (BSFl), is described in the supernatant of activated EL-4 thymoma cells as a factor that can co-stimulate B-cells activated with submitogenic concentrations of anti-IgM^[1].

The ED₅₀ is <0.2 μg/mL, measured in a proliferationassay using C6 cells.

Rat

CHO

C-6*His

P20096 (H23-S147)

287287  [NCBI]

Full Length of Mature Protein

HGCNDSPLREIINTLNQVTEKGTPCTEMFVPDVLTATRNTTENELICRASRVLRKFYFPRDVPPCLKNKSGVLGELRKLCRGVSGLNSLRSCTVNESTLTTLKDFLESLKSILRGKYLQSCTSMS

Approximately 18-22 kDa, based on SDS-PAGE under reducing conditions, due to the glycosylation.

≥ 95%, as determined by reducing SDS-PAGE.

Lyophilized powder.

Lyophilized after extensive dialysis against PBS.

<0.2 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O or PBS.

Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.

• [1]. /biology-dictionary/mcf7-cell.html  [Content Brief]

  [2]. Le HV, et al. Isolation and characterization of multiple variants of recombinant human interleukin 4 expressed in mammalian cells. J Biol Chem. 1988 Aug 5;263(22):10817-23.  [Content Brief]