ProDots Recombinant Human Flt-3 Ligand Protein

Supplied as ready-to-use 5 ug protein balls
Catalog # Availability Size / Price Qty
ProDots Recombinant Human Flt-3 Ligand Protein Bioactivity
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Product Details
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ProDots Recombinant Human Flt-3 Ligand Protein Summary

Pre-aliquoted, lyophilized protein dots for use in cell culture medium

  • Rolls out of bottle for easy cell culture medium preparation
  • Eliminates time spent aliquoting
  • One protein dot can be used to make 500 mL of 10 ng/mL cell culture medium

>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured in a cell proliferation assay using BaF3 mouse pro‑B cells transfected with mouse Flt-3. The ED50 for this effect is 0.2-1 ng/mL.
Spodoptera frugiperda, Sf 21 (baculovirus)-derived human Flt-3 Ligand protein
Thr27 - Pro185

Accession #
N-terminal Sequence
Predicted Molecular Mass
17.5 kDa
17-30 kDa, reducing conditions

Product Datasheets


Reconstitution For a stock solution, reconstitute at 100 μg/mL in sterile PBS, or simply roll ProDot® directly into cell culture medium for immediate use.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
• 6 months from date of receipt at room temperature as supplied.
• 12 months from date of receipt at 2-8 °C as supplied.
• 1 month at 2-8 °C under sterile conditions after reconstitution.
• 3 months at -20 to -80 °C under sterile conditions after reconstitution.

Data Images

Bioactivity ProDots Recombinant Human Flt-3 Ligand Protein Bioactivity View Larger

ProDots® Recombinant Human Flt-3 Ligand stimulatescell proliferation in the BaF3 mouse Pro-B cell line transfected withmouse Flt-3. The ED50 for this effect is 0.2-1 ng/mL.

SDS-PAGE ProDots Recombinant Human Flt-3 Ligand Protein SDS-PAGE View Larger

1 μg/lane of ProDots® Recombinant Human Flt-3 Ligandwas resolved with SDS-PAGE under reducing (R) conditions andvisualized with silver staining, showing major bands at 20-24 kDa.The multiple bands are due to variable glycosylation of the protein.

Reconstitution Calculator

Reconstitution Calculator

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Background: Flt-3 Ligand

Flt-3 Ligand, also known as FL, is an alpha-helical cytokine that promotes the differentiation of multiple hematopoietic cell lineages. Mature human Flt-3 Ligand consists of a 158 amino acid (aa) extracellular domain (ECD) with a cytokine-like domain and a juxtamembrane tether region, a 21 aa transmembrane segment, and a 30 aa cytoplasmic tail. Within the ECD, human Flt-3 Ligand shares 71% and 65% aa sequence identity with mouse and rat Flt-3 Ligand, respectively. Human and mouse Flt-3 Ligand show cross-species activity. Flt-3 Ligand is expressed as a noncovalently-linked dimer by T cells and bone marrow and thymic fibroblasts. Each 36 kDa chain carries approximately 12 kDa of N- and O-linked carbohydrates. Alternate splicing and proteolytic cleavage of the transmembrane form can generate a soluble 30 kDa fragment that includes the cytokine domain. Alternate splicing of human Flt-3 Ligand also generates membrane-associated isoforms that contain either a truncated cytoplasmic tail or an 85 aa substitution following the cytokine domain. Both transmembrane and soluble Flt-3 Ligand signal through the tyrosine kinase receptor Flt-3/Flk-2. Flt-3 Ligand induces the expansion of monocytes and immature dendritic cells as well as early B cell lineage differentiation. It synergizes with IL-3, GM-CSF, and SCF to promote the mobilization and myeloid differentiation of hematopoietic stem cells. It cooperates with IL-2, -6, -7, and -15 to induce NK cell development and with IL-3, -7, and -11 to induce terminal B cell maturation. Animal studies also show Flt-3 Ligand to reduce the severity of experimentally induced allergic inflammation.

Long Name
fms-like Tyrosine Kinase 3 Ligand
Entrez Gene IDs
2323 (Human); 14256 (Mouse); 493796 (Feline)
Alternate Names
FL; Flt3 ligand; Flt-3 Ligand; Flt3L; FLT3LG; fms-related tyrosine kinase 3 ligand; SL cytokine


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