Mir122a - Model 9568 - cTTG

This line is cryopreserved and requires cryorecovery.

C57BL/6 Background

  • Model #
  • Genotype
  • Nomenclature
  • 9568
    C57BL/6-Gt(ROSA)26Sortm1 (CAG-Mir122a)Mrl
  • The targeting vector has been transfected into TaconicArtemis C57Bl/6 ES cell line.
  • The following elements have been inserted into the ROSA26 locus: a CAG promoter cassette; a loxP-flanked transcription termination cassette (STOP) containing a combination of polyadenylation signals; the miR30-miR122a transgene and a polyadenylation site (hGH polyA).
  • The conditional TTG line has been generated by crossing chimeras to C57BL/6NTac animals.
  • The constitutive TTG allele can be generated by Cre-mediated recombination by crossing the line to a Cre-Deleter.
  • Deletion of the STOP cassette should result in transcription of the mir122a transgene.
  • The presence of the NeoR cassette will terminate the transcription from the ROSA26 promoter.
  • Datamining and Design performed in 2008.

Gene Family:


Gene Symbol:


Gene Accession Number:


Allele Type:






Official Gene Name:

microRNA 122a

Upon execution of the MTA terms of use, requestor needs to provide purchase order (PO) to cover the cryorecovery ($4,900 per cryopreserved GEM line) and additional shipment costs.

  1. Taconic will begin standard derivation of cryopreserved material (sperm or embryos) upon receipt of PO from recipient.
  2. Taconic will conduct testing using its International Health Monitoring System™ (IHMS™) to ensure that the mice meet a Murine Pathogen Free™ (MPF™) health status.
  3. Taconic will genotype the recovered mice prior to shipment.
  4. Taconic will provide a health status report, the genotyping results of the recovered animals and genotyping assay information for the requested GEM line.
  5. Taconic shall deliver a minimum of two (2) mice heterozygous at the selected gene of interest of a requested GEM line.
  6. Taconic will make shipping arrangements for the requested GEM to the Licensed Nonprofit recipient.
  7. Nonprofit investigator is responsible for covering the shipment costs.

Please note that in rare instances (2%) cryorecovery may prove to be difficult, either extending timeline or ultimately successful recovery.
NOTICE: Access to this model is conditioned on the requestor's institution agreeing to the terms and conditions of a Material Transfer Agreement (MTA).

Steps to initiate and place order:

  1. Nonprofit Investigator visits the Taconic website and identifies GEM of interest.
  2. Nonprofit Investigator inquires on Taconic website.
  3. Taconic will answer questions about the GEM lines and the process.
  4. Taconic sends request for MTA.
  5. Nonprofit Investigator provides scientific workplan answering 4 basic questions.
  6. MTA is issued for Nonprofit Investigator/institution review and signature.
  7. MTA is executed by all parties and release of GEM is approved.
  8. Taconic contacts requestor to obtain purchase order (PO) to cover the cryorecovery ($4,900 per cryopreserved GEM line) and shipment costs.
  9. Taconic begins cryorecovery upon receipt of PO and delivers GEM line to requestor (See pricing and Deliverables).

It is the requestor's obligation to determine that the GEM meets their research needs.

Learn more about Terms of Use, The Scientific Workplan and Frequently Asked Questions.