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Product category
Animal cells
Product type
Rattus norvegicus (B cell); Mus musculus (myeloma), rat (B cell); mouse (myeloma)
Cell type
hybridoma: b lymphocyte
Product format
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Price: $691.00 EA
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ATCC determines the biosafety level of a material based on our risk assessment as guided by the current edition of Biosafety in Microbiological and Biomedical Laboratories (BMBL), U.S. Department of Health and Human Services. It is your responsibility to understand the hazards associated with the material per your organization’s policies and procedures as well as any other applicable regulations as enforced by your local or national agencies.

ATCC highly recommends that appropriate personal protective equipment is always used when handling vials. For cultures that require storage in liquid nitrogen, it is important to note that some vials may leak when submersed in liquid nitrogen and will slowly fill with liquid nitrogen. Upon thawing, the conversion of the liquid nitrogen back to its gas phase may result in the vial exploding or blowing off its cap with dangerous force creating flying debris. Unless necessary, ATCC recommends that these cultures be stored in the vapor phase of liquid nitrogen rather than submersed in liquid nitrogen.

Detailed product information


Specific applications
Animals were immunized with the BMS2 bone marrow derived stromal cell line.
KM81 recognizes an epitope close to, but distinct from, those detected by KM201 and KM114 (see ATCC TIB-240 and ATCC TIB-241).


Growth properties
Animals were immunized with the BMS2 bone marrow derived stromal cell line.
Spleen cells were fused with Sp2/0 myeloma cells.
Genes expressed
immunoglobulin, monoclonal antibody, against the functional domain of mouse Pgp-1 (CD44)
Animals were immunized with the BMS2 bone marrow derived stromal cell line.
Spleen cells were fused with Sp2/0 myeloma cells.
The antibody blocks adhesion of a B cell hybridoma (BM-2) to BMS2 cells or to hyaluronate coated dishes.
The antibody prevents growth of lymphoid and myeloid cells in long term bone marrow cultures.
KM81 recognizes an epitope close to, but distinct from, those detected by KM201 and KM114 (see ATCC TIB-240 and ATCC TIB-241).

Handling information

Unpacking and storage instructions
  1. Check all containers for leakage or breakage.
  2. Remove the frozen cells from the dry ice packaging and immediately place the cells at a temperature below ­-130°C, preferably in liquid nitrogen vapor, until ready for use.
Complete medium
RPMI 1640 medium with 0.05 mM 2-mercaptoethanol and 2 mM L-glutamine, 85%; fetal bovine serum, 15%
Handling procedure

- Initiate culture as soon as possible upon receipt.

- Thaw by rapid agitation in 37°C water bath. Thawing should be rapid (within
40-60 seconds). As soon as the ice is melted, remove the ampule from the water
bath and immerse in 70% ethanol at room temperature. All of the operations from
this point on should be carried out under strict aseptic conditions.

- Transfer the cell suspension and dilute it with the recommended culture
medium in a culture flask (see specific batch information above for dilution
ratio); incubate at 37°C with 5% CO2 in air atmosphere. Since it is important
to avoid excessive alkalinity of the medium during recovery of the cells, it is
suggested that the culture medium be placed into the culture flask, tube, etc.
and the pH be adjusted, as necessary, prior to the addition of the ampule
contents. Note that the bicarbonate content of the culture medium will
determine whether an atmosphere containing CO2 will be required.

- It is not necessary to remove the freezing additive. However, if desired, the
culture medium may be changed to remove the protective freezing additive
(dimethylsulfoxide) 24 hours after thawing. If it is desired that the freezing
additive be removed immediately, or that a more concentrated cell suspension be
obtained, centrifuge the above diluted suspension at approximately 125 x g for
10 minutes, discard the fluid and resuspend the cells with growth medium at the
dilution ratio given in the specific batch information above.

Every 2-4 days.

Cultures can be established by addition of fresh culture medium or replacement
of medium. Alternatively cultures can be established by centrifugation with
subsequent resuspension at 1 x 10(5) viable cells/ml. Maintain cell density
between 1 x 10(5) and 1 x 10(6) viable cells/ml.
Subculturing procedure
Medium Renewal: Every 2 to 4 days
Cultures can be maintained by addition or replacement of fresh medium. Start cultures at 1 x 10 exp5 cells/ml and maintain between 1 x 10 exp5 and 1 x 10 exp6 cells/ml.

Quality control specifications

Mycoplasma contamination
Not detected


Deposited as
rat (B cell); mouse (myeloma)
PW Kincade
Special collection
Tumor Immunology Bank

Legal disclaimers

Intended use
This product is intended for laboratory research use only. It is not intended for any animal or human therapeutic use, any human or animal consumption, or any diagnostic use.

The product is provided 'AS IS' and the viability of ATCC® products is warranted for 30 days from the date of shipment, provided that the customer has stored and handled the product according to the information included on the product information sheet, website, and Certificate of Analysis. For living cultures, ATCC lists the media formulation and reagents that have been found to be effective for the product. While other unspecified media and reagents may also produce satisfactory results, a change in the ATCC and/or depositor-recommended protocols may affect the recovery, growth, and/or function of the product. If an alternative medium formulation or reagent is used, the ATCC warranty for viability is no longer valid.  Except as expressly set forth herein, no other warranties of any kind are provided, express or implied, including, but not limited to, any implied warranties of merchantability, fitness for a particular purpose, manufacture according to cGMP standards, typicality, safety, accuracy, and/or noninfringement.


This product is intended for laboratory research use only. It is not intended for any animal or human therapeutic use, any human or animal consumption, or any diagnostic use. Any proposed commercial use is prohibited without a license from ATCC.

While ATCC uses reasonable efforts to include accurate and up-to-date information on this product sheet, ATCC makes no warranties or representations as to its accuracy. Citations from scientific literature and patents are provided for informational purposes only. ATCC does not warrant that such information has been confirmed to be accurate or complete and the customer bears the sole responsibility of confirming the accuracy and completeness of any such information.

This product is sent on the condition that the customer is responsible for and assumes all risk and responsibility in connection with the receipt, handling, storage, disposal, and use of the ATCC product including without limitation taking all appropriate safety and handling precautions to minimize health or environmental risk. As a condition of receiving the material, the customer agrees that any activity undertaken with the ATCC product and any progeny or modifications will be conducted in compliance with all applicable laws, regulations, and guidelines. This product is provided 'AS IS' with no representations or warranties whatsoever except as expressly set forth herein and in no event shall ATCC, its parents, subsidiaries, directors, officers, agents, employees, assigns, successors, and affiliates be liable for indirect, special, incidental, or consequential damages of any kind in connection with or arising out of the customer's use of the product. While reasonable effort is made to ensure authenticity and reliability of materials on deposit, ATCC is not liable for damages arising from the misidentification or misrepresentation of such materials.

Please see the material transfer agreement (MTA) for further details regarding the use of this product. The MTA is available at

Permits & Restrictions

Import Permit for the State of Hawaii

If shipping to the U.S. state of Hawaii, you must provide either an import permit or documentation stating that an import permit is not required. We cannot ship this item until we receive this documentation. Contact the Hawaii Department of Agriculture (HDOA), Plant Industry Division, Plant Quarantine Branch to determine if an import permit is required.

This material was deposited by Oklahoma Medical Research Foundation and is distributed for research purposes only under the ATCC Material Transfer Agreement. This material has been released subject to the following:

  1. Transfers - the material must not be transferred to third parties for purposes of sale, or producing for sale.
  2. Commercial Use - all for-profit and non-profit Recipients must obtain a commercial use license prior to Commercial Use.

Any proposed commercial use of these cells or antibody produced from them must first be negotiated with:

Oklahoma Medical Research Foundation
825 N.E. 13th
Oklahoma City, OK 73104
Phone: (405) 271-7905.


Frequently Asked Questions


Curated Citations

Miyake K, et al. Monoclonal antibodies to Pgp-1/CD44 block lympho-hemopoiesis in long-term bone marrow cultures. J. Exp. Med. 171: 477-488, 1990. PubMed: 2406365

Miyake K, et al. Hyaluronate can function as a cell adhesion molecule and CD44 participates in hyaluronate recognition. J. Exp. Med. 172: 69-75, 1990. PubMed: 2193100

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