CellGenix® rh Flt-3L

GMP and Preclinical grade

CellGenix Recombinant Human Flt-3L reliably supports the proliferation of hematopoietic stem cells (HSCs). CellGenix rh Flt-3L is produced in our dedicated animal-free facility ensuring maximum safety for optimal use in ATMP manufacturing.

General Information

FMS-like Tyrosine Kinase 3 Ligand (FLt-3L) is a cytokine that regulates proliferation and differentiation of various blood cell progenitors.

Flt-3L is used in the cell and gene therapy space for the ex vivo expansion of HSCs that are used for transplantation.

GMP Grade

CellGenix GMP Recombinant Human Flt-3L is produced following all applicable GMP guidelines and allows for the safe use in accordance with USP Chapter <1043> and Ph. Eur. General Chapter 5.2.12.

Our GMP cytokines are provided with documented evidence of purity, potency, consistency and stability. In combination with our expert regulatory and technical support this will help simplify your raw material qualification and validation efforts.

CellGenix® Recombinant Human FMS-like Tyrosine Kinase 3 Ligand
E. coli
CellGenix® GMP rh Flt-3L
Order Number
50  µg
1 mg
CellGenix® Preclinical rh Flt-3L
Order Number
50  µg

CellGenix® rh Flt-3L


  • Produced in our dedicated animal-free facility
  • Compliant to USP Chapter <1043> and Ph. Eur. General Chapter 5.2.12 (GMP)
  • FDA Drug Master File available (GMP)

GMP & Preclinical Grade

  • Seamless transition from preclinical development to ATMP manufacturing


Highest GMP Quality Standard

  • High lot-to-lot consistency – save time and costs on revalidations
  • Performance reliability – rely on consistent product performance
  • Highest purity – ensure the safety of your ATMP
  • Extremely low endotoxin levels – improve safety and reproducibility
  • Expert regulatory & technical support – rely on experience

Read more about our GMP Quality


Safe │ GMP Compliant │ Reliable

Technical Details

Expressed in E. coli

Truncated human Flt-3L, accession # P49771, Thr27-Ala181


Lyophilized from a 0.2 µm-filtered solution containing 1.5 mM potassium phosphate, 8.1 mM sodium phosphate, 2.7 mM potassium chloride and 137 mM sodium chloride, pH 7.5

Both product grades are produced under the same conditions in a GMP facility, ensuring an equal product quality and performance. We offer a more comprehensive QC testing including tighter specifications and documentation for our GMP products: Preclinical vs GMP.

Molecular weight18.6 kDa18.6 kDa
Purity≥ 95% as determined by SDS-PAGE≥ 97% as determined by SDS-PAGE
Activity≥ 0.5 x 106 IU/mg, calibrated against NIBSC #96/532
Measured in a cell proliferation assay using a Flt-3L-dependent cell line, OCI-AML5
0.5 – 2.0 x 106 IU/mg, calibrated against NIBSC #96/532
Measured in a cell proliferation assay using a Flt-3L-dependent cell line, OCI-AML5

Batch specific activity on CoA

Endotoxin level< 1000 EU/mg≤ 50 EU/mg
Intended useIntended for preclinical ex vivo use. Not intended for therapeutic use.Intended for clinical ex vivo use. Not intended for human in vivo application.

Handling Instructions


Recommended in sterile water to a final concentration of 250 µg/ml for 50 µg vials or 500 µg/ml for 1 mg vials.


Ambient temperature. Please refer to Technote to learn more about our shipment validation procedure.


≥ 6 months from date of shipping. Please refer to Certificate of Analysis for the exact expiry date.

Storage & Stability

Store lyophilized cytokine at -20°C to -80°C.

Store a 250 µg/ml reconstituted cytokine solution:

• 4 weeks at 2°C to 8°C under sterile conditions after reconstitution. Store in the original container. 

• 4 months at -20°C to -80°C under sterile conditions after reconstitution. Store in 60 µl aliquots in polypropylene cryogenic vials.

Avoid repeated freeze/thaw cycles.



CellGenix GMP rh Flt-3L has an activity of 0.5 – 2.0 × 106 IU/mg

The activity of GMP rh Flt-3L was measured in a cell proliferation assay using the Flt-3L-dependent cell line OCI-AML5. It was calibrated against NIBSC #96/532.

You can find the batch specific activity on the Certificate of Analysis (CoA).

Regulatory Support

We offer the following to assist you with your regulatory approval process:

  • Comprehensive documentation (e.g. DMFs, Regulatory Support Files, Certificates of Origin)
  • Outstanding QC support (e.g. extensive stability data)
  • The possibility to audit our production site
  • Detailed batch specific test results on our Certificates of Analysis
  • Change notifications prior to relevant changes

Customized solutions can be provided to meet special compliance needs. Contact our Regulatory Support Team for all your regulatory requests & questions:

Phone:     +49 761 88 88 9-302
Email:      regulatorysupport@cellgenix.com


In order to stay up-to-date with the international guidelines for raw materials, we are in constant interaction with regulatory authorities worldwide. In this regard, we amongst others helped defining the European guidelines which are outlined in the new general chapter Ph. Eur. monograph 5.2.12.


Regulatory Resources