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Quality & FAQ

Product Features

  • 600+ GMP-level cytokines manufactured according to ISO 9001:2008 requirements.
  • Apply to cell induction & differentiation.(pic1)
  • Optimized activity (head to head comparison with leading brands, pic2)

Pic 1 Human Embryonic Stem Cells
Cultured with Recombinant Human bFGF

VEGF165 Conc.(ng/ml)
Pic2.VEGF165 induction experiment

Pic3. Marmoset IL17A

  • Ultrapure ( >90% by SDS-PAGE,pic3 )
  • Low Endotoxin ( <0.1 EU per μg by LAL).
  • Multi-species coverage including Human/ Rat/ Mouse/ Canine/ Ferret/ Rhesus…
  • Carrier Free: dissolved in PBS, without BSA.
  • All products in stock. Lyophilized, Shipped at RT.
  • Qualified raw materials, All traceable. Animal free.


1. Stability: Samples are stable for up to twelve months from date of receipt at -70℃. Store it under sterile conditions at -20℃ to -80℃.
2. Form & Shipping: In general, recombinant proteins are provided as lyophilized powder which is 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.
3. Formulation:
a) In general, the cytokine is lyophilized from sterile PBS. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Detailed information are included in the hardcopy of COA respectively.
b) Please contact us for any concerns or special requirements.
4. Packaging:
Protein could be divided into single aliquot for optimal storage (Carrier protein such as 1% BSA, 10% FBS or 5% HSA is recommended. Avoid repeated freeze-thaw cycles. Detailed information are included in the hardcopy of COA respectively.
Check our 5μg special package at the price of $ 38!
5. Before use: To dislodge any lyophilized materials on the wall or cap of the vial, centrifuge the vial for 30s at full speed (10000r/min) in a tabletop centrifuge (or centrifuge for 5 min at 5000r/min).
6. Endotoxin: <0.1 EU per μg of the protein as determined by the LAL method. Specific value is included in the hardcopy of COA respectively. Please contact us for any concerns or special requirements.
7. Purity & Activity: In general, the purity of our cytokines is strictly beyond 95% and undergo activity-testing procedures according to their precise functions. Specific items are included in the hardcopy of COA respectively.
For species cross activity please contact our technical support at +86-400-890-9989or mail toOrder@Sinobiological.com.
8. ED50 and Units/mg: ED50 ,50% Effective Dose, represent the concentration of cytokine which can induce 50% maximum specific reaction (sigmoid activity curve).
Conversion : Cytokine X ED50 = 1ng/ml; therefore, 1ng/ml = 1 Unit; 1mg X =1*106 Unit.
9. Animal free: We use qualified raw materials (reagents, media, growth factors, etc.) without any animal origins and have a GMP-level workshop to ensure our products are mycoplasma, endotoxin, and sterility (etc.) tested.
Animal free products are recommended to apply to experiments such as in-vivo experiments or cell therapy research.
10. Carrier free: Sinobiological cytokines exhibit superb activity without BSA or any other carrier protein to ensure finite variance and no interference on in-vivo applications.

Products have been referenced in (Segmental)

Institute Journal Products Cat NO.
Zhang, X;Zuo-Wuhan University, Cell-2014 AGO2 11079-H07B
Yang, Y;Kulka-University of Pittsburgh Cell Host Microbe-2014 IFNG 11725-HNAS-100
Yang, Y;Kulka-University of Pittsburgh Cell Host Microbe-2014 IFNG 11725-HNAS-100
YM Fu-PLA General Hospital Journal of Orthopaedic Research-2014 BMP-2 10426-HNAE
L Turner-University of Copenhagen and Department of Infectious Diseases Nature-2013 EPCR 13320-H08H
LeBleu, VS;Teng-Department of Medicine, Beth Israel Deaconess Medical Center, Massachusetts Nature Medicine-2013 HE4 / WFDC2 12609-H08H
Nisbet-CSIRO Protein Engineering,Design and Selection-2013 NGF 11050-HNAC
GY Wu-Tsinghua University PPAR Research-2013 TNF-α 10602-HNAE
Y Li-FuDan University Bioconjugate Chemistry-2013 β-FGF 10014-HNAE
Yilmaz-MIT Nature-2012 mRSPO1 50316-M08H
W Gao-Peking Union Medical Leukemia Research-2011 VEGF-165 11066-HNAH
XQ He-CDC, US Chemical research in toxicology-2011 IL-1β 10139-HNAE