Human IL4 / Interleukin-4 Prot

分子别名（Synonym）:BCGF-1,BCGF1,BSF-1,BSF1,IL-4,Interleukin-4 种属（Species）：Human 表达系统（Expressed Host）：E. coli 制剂（Buffer）：Lyophilized from sterile 20mM MES, 200mM NaCl, pH 6.0 分子量（Molecule Mass）：The recombinant human IL4 consisting of 130 amino acids and migrates with an apparent molecular mass of 15 kDa as predicted. 内毒素（Endotoxin）：＜1.0 EU per μg by the LAL method. 生物活性(Activity)：Measured in a cell proliferation assay using TF-1 human erythroleukemic cells. The ED50 for this effect is 0.05-0.2 ng/mL. 表达区间（Protein Construction）：A DNA sequence encoding the mature form of human IL4 isoform 1 (P05112-1) (His 25-Ser 153) was expressed and purified, with an initial Met. 存储条件（Storage）： For long term storage, the product should be stored at lyophilized state at -20℃ or lower.Please avoid repeated freeze-thaw cycles. No activity loss is observed after storage at:4-8℃ for 12 months in lyophilized state;-70℃ for 3 months under sterile conditions after reconstitution. 运输条件： In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.