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HT-2 clone A5E


HT-2 clone A5E is a lymphocyte cell line that was isolated in 1979 from the spleen of a mouse. This cell line was deposited by JF Weaver, A Creasey, and can be used in immunology research.
Product category
Animal cells
Mus musculus, mouse
Eukaryota, Animalia, Metazoa, Chordata, Vertebrata, Tetrapod
Cell type
3D cell culture
Product format
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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.

Required Products

These products are vital for the proper use of this item and have been confirmed as effective in supporting functionality. If you use alternative products, the quality and effectiveness of the item may be affected.

Detailed product information


Specific applications

The line is dependent on IL-2 for growth and can be used to measure IL-2 activity in a very rapid and sensitive assay.

The cells are commonly used for characterization of lymphokines and cytokines.


Growth properties

The HT-2 cell line was derived in 1979 by J. Watson at the University of Auckland from a culture of C57BL spleen cells activated by sheep erythrocytes in the presence of IL-2.

This cell line was originally deposited as derived from the BALB/c strain of mice. Recent testing at ATCC and by the NIST Mouse STR Consortium using mouse STR technology has shown that the STR profile has more alleles in common with a C57BL mouse strain rather than BALB/c.


Antigen expression
Expression markers
Interleukin 2 (IL-2)
The A5E clone was selected to provide a homogeneous population that is highly sensitive to IL-2.

In addition to IL-2, substantial proliferation is seen in the presence of interleukin 4 (interleukin-4, IL-4, also known as BSF-1).

Note: This HT-2 clone A5E cell line was originally deposited as derived from the BALB/c strain of mice. Recent testing at ATCC and by the NIST Mouse STR Consortium using mouse STR technology has shown that the STR profile has more alleles in common with a C57BL mouse strain rather than BALB/c. Based on this analysis, ATCC® CRL-1841™ has been put on the misidentified cell lines list.

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
The complete medium for culturing CRL-1841 is composed of:
399.5 mL RPMI-1640 (ATCC 30-2001)
50 mL FBS (ATCC 30-2020)
0.5 mL 2-Mercaptoethanol (Gibco 21985-023)
50 mL Rat T-STIM with Con A (Thermo Fisher CB-40115)
Handling procedure

To insure the highest level of viability, thaw the vial and initiate the culture as soon as possible upon receipt. If upon arrival, continued storage of the frozen culture is necessary, it should be stored in liquid nitrogen vapor phase and not at -70°C.  Storage at -70°C will result in loss of viability.

  1. Thaw the vial by gentle agitation in a 37°C water bath. To reduce the possibility of contamination, keep the O-ring and cap out of the water.  Thawing should be rapid (approximately 2 minutes).
  2. Remove the vial from the water bath as soon as the contents are thawed, and decontaminate by dipping in or spraying with 70% ethanol. All of the operations from this point on should be carried out under strict aseptic conditions.
  3. Transfer the vial contents to a centrifuge tube containing  9.0 mL complete culture medium. and spin at approximately 125 x g for 5 to 7 minutes.
  4. Resuspend cell pellet with the recommended complete medium (see the specific batch information for the culture recommended dilution ratio). and dispense into a new culture flask.  It is important to avoid excessive alkalinity of the medium during recovery of the cells.  It is suggested that, prior to the addition of the vial contents, the culture vessel containing the complete growth medium be placed into the incubator for at least 15 minutes to allow the medium to reach its normal pH (7.0 to 7.6). pH (7.0 to 7.6).
  5. Incubate the culture at 37°C in a suitable incubator.  A 5% CO2 in air atmosphere is recommended if using the medium described on this product sheet.


Subculturing procedure
Cultures can be maintained by addition or replacement of fresh medium. Subcuture every two days at 3.5 x 10 4 viable cells/mL.
Medium Renewal: Every 2 to 3 days
Reagents for cryopreservation
Complete growth medium supplemented with 5% (v/v) DMSO (ATCC 4-X)

Quality control specifications

Mycoplasma contamination
Not detected


Deposited as
Mus musculus
JF Weaver, A Creasey
Year of origin

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.


Frequently Asked Questions


Curated Citations

Kupper T, et al. Growth of an interleukin-2/interleukin 4-dependent T cell line induced by granulocyte-macrophage colony-stimulating factor (GM-CSF). J. Immunol. 138: 4288-4292, 1987. PubMed: 2953804

Ho SN, et al. Differential bioassay of interleukin-2 and interleukin-4. J. Immunol. Methods 98: 99-104, 1987. PubMed: 3494085

Lee F, et al. Isolation and characterization of a mouse interleukin cDNa clone that expresses B-cell stimulatory factor 1 activities and T-cell and mast-cell-stimulating activities. Proc. Natl. Acad. Sci. USA 83: 2061-2065, 1986. PubMed: 3083412

Watson J. Continuous proliferation of murine antigen-specific helper T lymphocytes in culture. J. Exp. Med. 150: 1510-1519, 1979. PubMed: 92524

. . J. Biol. Response Modif. 4: 96-109, 1985.

View All Curated Citations for this Product

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