These Kitl mutant mice carry a floxed exon which, when excised through a cross with a cre strain, enables tissue-specific disruption of gene expression.
Sean J Morrison, University of Texas Southwestern Medical CenterRead More +
These mice possess loxP sites on either side of exon 1 of the Kitl (kit ligand; also called Scf, stem cell factor) gene. Mice that are homozygous for this allele are viable and fertile with no observed abnormalities. When these mutant mice are bred to mice that express Cre recombinase, the resulting offspring will have exon 1 deleted in cre-expressing tissues.
Mice generated from a cross of these mice with Ubc-creER animals (e.g. Stock No. 008085) can be treated with tamoxifen to induce widespread deletion of the floxed segment. These mice become anemic and show significantly lower red blood cell counts, trend towards lower white blood cell and pletelet counts, and exhibit approximately twofold reductions in the overall cellularity of bone marrow and spleen.
A loxP site was introduced 5' of exon 1 and an Frt-Neo-Frt-loxP cassette was placed 3' of exon 1 in sites that do not disrupt regulatory elements of the targeted gene. C57BL/6-derived Bruce 4 G9 embryonic stem (ES) cells were used to create the mutation. Chimeric mice were bred with C57BL/6-Tyrc-2J mice to obtain germline transmission. Animals were then crossed with C57BL/Ka background Flp-expressing mice to excise the neomycin cassette, leaving exon 1 flanked by loxP sites. This strain was backcrossed to C57BL/Ka for six generations by the donating laboratory. Upon arrival at The Jackson Laboratory, C57BL/6J was used for rederivation.
|Allele Name||targeted mutation 2.1, Sean J Morrison|
|Allele Type||Targeted (Conditional ready (e.g. floxed), No functional change)|
|Gene Symbol and Name||Kitl, kit ligand|
|Gene Synonym(s)||Clo; Con; DCUA; FPH2; FPHH; Gb; Gb; KL-1; MGF; Mgf; Mgf; SCF; SF; SHEP7; SLF; Sl; Sl; Steel; Steel factor; blaze; blz; blz; cloud gray; contrasted; grizzle-belly; grizzle-belly; mast cell growth factor; steel; stem cell factor|
|Strain of Origin||B6.Cg-Thy1|
|Molecular Note||An FRT-flanked neo cassette with loxP site was inserted downstream of exon 1 and an additional loxP site was inserted upstream of exon 1. The neo cassette was removed by flp-mediated recombination.|
|Mutations Made By|| |
Sean Morrison, University of Texas Southwestern Medical Center
|Please inquire about possible genotypes.|
The average number of mice provided from recovery of our cryopreserved strains is 10. The total number of animals provided,
their gender and genotype will vary. We will fulfill your order by providing at least two pair of mice, at least one animal of
each pair carrying the mutation of interest. Please inquire if larger numbers of animals with specific genotype and genders
are needed. Animals typically ship between 10 and 14 weeks from the date of your order. If a second cryorecovery is needed in
order to provide the minimum number of animals, animals will ship within 25 weeks.
The genotypes of animals provided may not reflect the mating scheme utilized by The Jackson Laboratory prior to cryopreservation, or that discussed in the strain description. Please inquire about possible genotypes which will be recovered for this specific strain. The Jackson Laboratory cannot guarantee the reproductive success of mice shipped to your facility. If the mice are lost after the first three days (post-arrival) or do not produce progeny at your facility, a new order and fee will be necessary.
Cryorecovery to establish a Dedicated Supply for greater quantities of mice. Mice recovered can be used to establish a dedicated colony to contractually supply you mice according to your requirements. Price by quotation.
"MICE" means mouse strains, their progeny derived by inbreeding or crossbreeding, unmodified derivatives from mouse strains or their progeny supplied by The Jackson Laboratory ("JACKSON"). "PRODUCT(S)" means biological materials supplied by JACKSON, and their derivatives. "SERVICES" means projects conducted by JACKSON for other parties that may include but are not limited to the use of MICE or PRODUCTS. "RECIPIENT" means each recipient of MICE, PRODUCTS, or SERVICES provided by JACKSON including each institution, its employees and other researchers under its control. MICE or PRODUCTS shall not be: (i) used for any purpose other than internal research, (ii) sold or otherwise provided to any third party for any use, or (iii) provided to any agent or other third party to provide breeding or other services. Acceptance of MICE, PRODUCTS or SERVICES from JACKSON shall be deemed as agreement by RECIPIENT to these conditions, and departure from these conditions requires JACKSON’s prior written authorization.
MICE, PRODUCTS AND SERVICES ARE PROVIDED "AS IS". JACKSON EXTENDS NO WARRANTIES OF ANY KIND, EITHER EXPRESS, IMPLIED, OR STATUTORY, WITH RESPECT TO MICE, PRODUCTS OR SERVICES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR ANY WARRANTY OF NON-INFRINGEMENT OF ANY PATENT, TRADEMARK, OR OTHER INTELLECTUAL PROPERTY RIGHTS.
In case of dissatisfaction for a valid reason and claimed in writing by a purchaser within ninety (90) days of receipt of, PRODUCTS or SERVICES, JACKSON will, at its option, provide credit or replacement for the PRODUCT received or the SERVICES provided; JACKSON makes no other representations and this shall be the exclusive remedy of the purchaser. Please note specific policy for live mice.
Consistent with the requirement for a written understanding regarding animal care and use, the JACKSON Animal Care and Use Committee will review the animal care and use protocol(s) associated with any SERVICES to be performed at JACKSON, and JACKSON shall have ultimate responsibility and authority for the care of animals while on site or in JACKSON custody.
In no event shall JACKSON, its trustees, directors, officers, employees, and affiliates be liable for any causes of action or damages, including any direct, indirect, special, or consequential damages, arising out of the provision of MICE, PRODUCTS, or SERVICES, including economic damage or injury to property and lost profits, and including any damage arising from acts or negligence on the part of JACKSON, its agents or employees. Unless prohibited by law, in purchasing or receiving MICE, PRODUCTS, or SERVICES from JACKSON, purchaser or recipient, or any party claiming by or through them, expressly releases and discharges JACKSON from all such causes of action or damages, and further agrees to defend and indemnify JACKSON from any costs or damages arising out of any third party claims.
MICE, PRODUCTS or SERVICES are to be used in a safe manner and in accordance with all applicable governmental rules and regulations.
The foregoing represents the General Terms and Conditions applicable to JACKSON’s MICE, PRODUCTS or SERVICES. In addition, special terms and conditions of sale of certain MICE, PRODUCTS, or SERVICES may be set forth separately in JACKSON web pages, catalogs, price lists, contracts, and/or other documents, and these special terms and conditions shall also govern the sale of these MICE, PRODUCTS and SERVICES by JACKSON, and by its licensees and distributors.
Acceptance of delivery of MICE, PRODUCTS or SERVICES shall be deemed agreement to these terms and conditions. No purchase order or other document transmitted by purchaser or recipient that may modify the terms and conditions hereof, shall be in any way binding on JACKSON, and instead the terms and conditions set forth herein, including any special terms and conditions set forth separately, shall govern the sale of MICE, PRODUCTS or SERVICES by JACKSON.