QBSF-55 Serum Free Medium

ItemSize List Price Qty
160-107-101 500 mL $118.39


QBSF-55 is a proprietary low protein (67.4±15% µg/ml) serum-free medium. QBSF-55 is designed to support the growth of hybridomas and enhance the production of monoclonal antibodies.

The low protein concentration in QBSF-55 simplifies the downstream processing and recovery of monoclonal antibodies. Using QBSF-55 reduces target protein losses due to co-separation with serum or other proteins present in high concentration.

  • Serum-Free
  • Contains L-glutamine & Phenol Red
  • Endotoxin, mycoplasma, and performance tested
  • Sterile Filtered


QBSF-55 is designed to support the growth of a number of hybridomas. The following cell lines have been successfully propagated in QBSF-55 Serum-Free Medium: ACT I, ACT IV, NS-1, COLO 205, COLO 321, H9 (HIV infected), R17 217.13, 5637, HeLa, P388.01, SP2/O AG14, FDCP-1, HB-24, R17 208.2, VERO, H9, and CEM.

The QBSF products have been used successfully in different cell culture applications; investigators are encouraged to explore new uses.

QBSF products used in various applications

  • Serum-free culture conditions for cells capable of producing long-term survival in lethally irradiated mice. Brown et al. Stem Cells. 1997;15(3):237-45.
  • HES1 inhibits cycling of hematopoietic progenitor cells via DNA binding. Yu et al., Stem Cells. 2006 Apr;24(4):876-88.
  • Constitutive activation of STAT5A promotes human hematopoietic stem cell self-renewal and erythroid differentiation. Schuringa et al., J Exp Med. 2004 Sep 6;200(5):623-35.
  • Acute Sensitivity of Ph-like Acute Lymphoblastic Leukemia to the SMAC-Mimetic Birinapant. Richmond et al., Cancer Res. 2016 Aug 1;76(15):4579-91.
  • Initial CD34+ cell-enrichment of cord blood determines hematopoietic stem/progenitor cell yield upon ex vivo expansion. Andrade et al., J Cell Biochem. 2011 Jul;112(7):1822-31.
  • Efficient iPS cell generation from blood using episomes and HDAC inhibitors. Hubbard JJ. et al., J Vis Exp. 2014 Oct 28;(92):e52009.
  • Short-term exposure of umbilical cord blood CD34+ cells to granulocyte-macrophage colony-stimulating factor early in culture improves ex vivo expansion of neutrophils. Marturana et al., Cytotherapy. 2011 Mar;13(3):366-77.
  • Stromal cell-free conditions favorable for human B lymphopoiesis in culture. Ichii et al., J Immunol Methods. 2010 Jul 31;359(1-2):47-55.
  • Adaptation of BHK cells producing a recombinant protein to serum-free media and protein-free medium. Cruz et al. Cytotechnology. 1998 Jan;26(1):59-64.
  • Grafts of adenosine-releasing cells suppress seizures in kindling epilepsy. Huber et al. Proc Natl Acad Sci U S A. 2001 Jun 19;98(13):7611-6.
  • Cytosine deaminase adenoviral vector and 5-fluorocytosine selectively reduce breast cancer cells 1 million-fold when they contaminate hematopoietic cells: a potential purging method for autologous transplantation. Garcia-Sanchez et al. Blood. 1998 Jul 15;92(2):672-82.


Storage Conditions: 2°C to 8°C

Shipping condition: ambient temperature

Sterile Filtered

Endotoxin and Mycoplasma Tested

pH: 7.0± 0.2

Osmolality: 285 ± 3% mOsm/Kg H20

Product and/or packaging contains recycled/renewable content Product and/or packaging is recyclable or reduces waste Product and/or packaging is safer to human and environmental health

Harmonization Code: 3821.00.0000


Max Shelf Life: 24 months


Additional information

Weight 32 oz
Dimensions 3 × 12 × 7 in
Vendor Number


Unit Quantity

500 mL

Product Manufacturer

Quality Biological

Product Documentation

QBSF Product Line Literature
Safety Data Sheet 160-107
Technical Information Sheet 160-107