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Recombinant Human/Mouse FGF-8b Protein


Recombinant Human/Mouse FGF-8b (Catalog # 423-F8) stimulates cell proliferation in the NR6R‑3T3 mouse fibroblast cell line. The ED50 for this effect is 6.5-40 ng/mL in the presence of 1 μg/mL heparin.
1 μg/lane of Recombinant Human/Mouse FGF-8b was resolved with SDS-PAGE under reducing (R) conditions and visualized by silver staining, showing a single band at 23 kDa.
Dopaminergic neurons were generated from human pluripotent stem cells in media that included Bovine Fibronectin Protein (1030-FN) to support cell attachment and spreading, the ITS and N-2 Plus Media Supplements (AR013 more
Dopaminergic neurons were generated from human pluripotent stem cells in media that included Bovine Fibronectin Protein (1030-FN) to support cell attachment and spreading, the ITS and N-2 Plus Media Supplements (AR013 more

Product Details

Reactivity Hu, MuSpecies Glossary
Applications Bioactivity

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Recombinant Human/Mouse FGF-8b Protein Summary

Details of Functionality
Measured in a cell proliferation assay using NR6R‑3T3 mouse fibroblast cells. Raines, E.W. et al. (1985) Methods Enzymol. 109:749. The ED50 for this effect is typically 6.5-40 ng/mL in the presence of 1 µg/mL heparin.
E. coli-derived FGF-8 protein
Gln23-Arg215, with an N-terminal Met
Accession #
N-terminal Sequence
Protein/Peptide Type
Recombinant Proteins
>97%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Note
<0.01 EU per 1 μg of the protein by the LAL method.


  • Bioactivity
Theoretical MW
22.5 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
23 kDa, reducing conditions
Reviewed Applications
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423-F8 in the following applications:

Packaging, Storage & Formulations

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 3 months, 2 to 8 °C under sterile conditions after reconstitution.
Lyophilized from a 0.2 μm filtered solution in MOPS, Na2SO4 and Brij-35 with BSA as a carrier protein.
>97%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Reconstitution Instructions
Reconstitute at 25 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.


This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human/Mouse FGF-8b Protein

  • AIGF
  • Androgen-induced growth factor
  • FGF8
  • FGF-8
  • fibroblast growth factor 8 (androgen-induced)
  • fibroblast growth factor 8
  • HBGF-8
  • Heparin-binding growth factor 8
  • MGC149376


FGF-8 is a member of the fibroblast growth factor family that was originally discovered as a growth factor essential for the androgen-dependent growth of mouse mammary carcinoma cells (1-3). Alternate splicing of mouse FGF-8 mRNA generates eight secreted isoforms, designated a-h, but only FGF-8a, b, e and f exist in humans (4). FGF-8 contains a 22 amino acid (aa) signal sequence, an N‑terminal domain that varies according to the isoform (30 aa for FGF-8b; 20 aa for the shortest, FGF-8a), a 125 aa FGF domain and a 37 aa proline‑rich C‑terminal sequence. The FGF domain of FGF-8 shares the most aa identity with FGF17 (75%) and FGF-18 (67%), and the three form an FGF subfamily (2). Mouse FGF-8b shares 100% aa identity with human FGF-8b. FGF-8 is widely expressed during embryogenesis, and mediates epithelial-mesenchymal transitions. It plays an organizing and inducing role during gastrulation, and regulates patterning of the midbrain/hindbrain, eye, ear, limbs and heart in the embryo (2, 5 - 8). The isoforms may play different roles in development. FGF-8b shows the strongest receptor affinity and oncogenic transforming capacity although FGF-8a and FGF-8e are also transforming and have been found in human prostate, breast or ovarian tumors (1, 5, 9-12). FGF-8 shows limited expression in the normal adult, but low levels are found in the reproductive and genitourinary tract, peripheral leukocytes and bone marrow hematopoietic cells (3, 9, 13).

  1. Mattila, M.M. and P.L. Harkonen (2007) Cytokine Growth Factor Rev. 18:257.
  2. Reuss, B. and O. von Bohlen und Halbach (2003) Cell Tiss. Res. 313:139.
  3. Tanaka, A. et al. (1992) Proc. Natl. Acad. Sci. USA 89:8928.
  4. Gemel, J. et al. (1996) Genomics 35:253.
  5. Olsen, S.K. et al. (2006) Genes Dev. 20:185.
  6. Crossley, P.H. et al. (1996) Cell, 84:127.
  7. Heikinheimo, M. et al. (1994) Mech. Dev. 48:129.
  8. Sun, X. et al. (1999) Genes Dev. 13:1834.
  9. Ghosh, A.K. et al. (1996) Cell Growth Differ. 7:1425.
  10. Mattila, M.M. et al. (2001) Oncogene 20:2791.
  11. Valve, E. et al. (2000) Int. J. Cancer 88:718.
  12. Valve, E.M. et al. (2001) Lab. Invest. 81:815.
  13. Nezu, M. et al. (2005) Biochem. Biophys. Res. Commun. 335:843.

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Publications for FGF-8 (423-F8)(60)

We have publications tested in 9 confirmed species: Human, Mouse, Rat, Avian - Quail, Chicken, Primate - Macaca mulatta (Rhesus Macaque), Rabbit, Xenopus, Zebrafish.

We have publications tested in 5 applications: Bioassay, Cell Culture, Differentiation, In Ovo, In Vivo.

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Showing Publications 1 - 10 of 60. Show All 60 Publications.
Publications using 423-F8 Applications Species
Chen, Y;Kuang, J;Niu, Y;Zhu, H;Chen, X;So, KF;Xu, A;Shi, L; Multiple factors to assist human-derived induced pluripotent stem cells to efficiently differentiate into midbrain dopaminergic neurons Neural regeneration research 2024-04-01 [PMID: 37843228] (Bioassay, Human) Bioassay Human
S Wu, NC Hernandez, DW Sirkis, I Thomas-Wri, R Wade-Marti, R Schekman Unconventional secretion of alpha-synuclein mediated by palmitoylated DNAJC5 oligomers Elife, 2023-01-10;12(0):. 2023-01-10 [PMID: 36626307] (Bioassay, Mouse) Bioassay Mouse
CB Pantazis, A Yang, E Lara, JA McDonough, C Blauwendra, L Peng, H Oguro, J Kanaujiya, J Zou, D Sebesta, G Pratt, E Cross, J Blockwick, P Buxton, L Kinner-Bib, C Medura, C Tompkins, S Hughes, M Santiana, F Faghri, MA Nalls, D Vitale, S Ballard, YA Qi, DM Ramos, KM Anderson, J Stadler, P Narayan, J Papademetr, L Reilly, MP Nelson, S Aggarwal, LU Rosen, P Kirwan, V Pisupati, SL Coon, SW Scholz, T Priebe, M Öttl, J Dong, M Meijer, LJM Janssen, VS Lourenco, R van der Ka, D Crusius, D Paquet, AC Raulin, G Bu, A Held, BJ Wainger, RMC Gabriele, JM Casey, S Wray, D Abu-Bonsra, CL Parish, MS Beccari, DW Cleveland, E Li, IVL Rose, M Kampmann, C Calatayud, P Verstreken, L Heinrich, MY Chen, B Schüle, D Dou, ELF Holzbaur, MC Zanellati, R Basundra, M Deshmukh, S Cohen, R Khanna, M Raman, ZS Nevin, M Matia, J Van Lent, V Timmerman, BR Conklin, K Johnson Ch, K Zhang, S Funes, DA Bosco, L Erlebach, M Welzer, D Kronenberg, G Lyu, E Arenas, E Coccia, L Sarrafha, T Ahfeldt, JC Marioni, WC Skarnes, MR Cookson, ME Ward, FT Merkle A reference human induced pluripotent stem cell line for large-scale collaborative studies Cell Stem Cell, 2022-12-01;29(12):1685-1702.e22. 2022-12-01 [PMID: 36459969] (Bioassay, Human) Bioassay Human
JS Park, J Choi, L Cao, J Mohanty, Y Suzuki, A Park, D Baker, J Schlessing, S Lee Isoform-specific inhibition of FGFR signaling achieved by a de-novo-designed mini-protein Cell Reports, 2022-10-25;41(4):111545. 2022-10-25 [PMID: 36288716] (Bioassay, Human) Bioassay Human
H Ozaki, H Suga, M Sakakibara, M Soen, N Miyake, T Miwata, S Taga, T Nagai, M Kano, K Mitsumoto, T Miyata, T Kobayashi, M Sugiyama, T Onoue, H Takagi, D Hagiwara, S Iwama, R Banno, G Iguchi, Y Takahashi, K Muguruma, H Inoue, H Arima Differentiation of human induced pluripotent stem cells into hypothalamic vasopressin neurons with minimal exogenous signals and partial conversion to the naive state Scientific Reports, 2022-10-17;12(1):17381. 2022-10-17 [PMID: 36253431] (Cell Culture, Human) Cell Culture Human
DS Lee, YJ Song, HR Gug, JH Lee, HS Bae, JC Park Nuclear Factor I-C Regulates Stemness Genes and Proliferation of Stem Cells in Various Mineralized Tissue through Epithelial-Mesenchymal Interactions in Dental Epithelial Stem Cells Stem Cells International, 2022-09-27;2022(0):1092184. 2022-09-27 [PMID: 36213683] (Cell Culture, Mouse) Cell Culture Mouse
L Yu, M Toriseva, S Afshan, M Cangiano, V Fey, A Erickson, H Seikkula, K Alanen, P Taimen, O Ettala, M Nurmi, PJ Boström, M Kallajoki, J Tuomela, T Mirtti, IJ Beumer, M Nees, P Härkönen Increased Expression and Altered Cellular Localization of Fibroblast Growth Factor Receptor-Like 1 (FGFRL1) Are Associated with Prostate Cancer Progression Cancers, 2022-01-07;14(2):. 2022-01-07 [PMID: 35053442] (Bioassay, Human) Bioassay Human
N Hosaka, S Kanda, T Shimono, T Nishiyama Induction of gammadeltaT cells from HSC-enriched BMCs co-cultured with iPSC-derived thymic epithelial cells Journal of Cellular and Molecular Medicine, 2021-10-23;0(0):. 2021-10-23 [PMID: 34687276] (Cell Culture, Mouse) Cell Culture Mouse
M Restan Per, R Sharma, NZ Masri, SM Willerth 3D Bioprinting Mesenchymal Stem Cell-Derived Neural Tissues Using a Fibrin-Based Bioink Biomolecules, 2021-08-21;11(8):. 2021-08-21 [PMID: 34439916] (Bioassay, Human) Bioassay Human
C Zhou, D Chen, J Ren, D Huang, R Li, H Luo, C Guan, Y Cao, W Wang FGF8 and BMP2 mediated dynamic regulation of dental mesenchyme proliferation and differentiation via Lhx8/Suv39h1 complex Journal of Cellular and Molecular Medicine, 2021-02-13;0(0):. 2021-02-13 [PMID: 33580754] (Bioassay, Human, Mouse) Bioassay Human, Mouse
Show All 60 Publications.

Review for FGF-8 (423-F8) (1) 51

Average Rating: 5
(Based on 1 review)

Reviews using 423-F8:
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Stem/Immune cell maintenance or differentiation  FGF-8 423-F8
reviewed by:
Verified Customer
Stem/Immune cell maintenance or differentiation 09/11/2019


ApplicationStem/Immune cell maintenance or differentiation
CommentsUsed for differentiation of human iPSC to dopaminergic neurons. easy to reconstitute and wasn't toxic to cells.

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Application: Stem/Immune cell maintenance or differentiation