• $100 discount for first 1 mg order: CreDiscount
• $150 competitor switch discount (email crm@excellgen.com for code)

Cre recombinase is a 38 kDa Type I topoisomerase from bacteriophage P1 that catalyzes site-specific recombination between loxP sites (34 bp sequences consisting of two 13 bp inverted repeats flanking an 8 bp spacer). The enzyme requires no energy cofactors and achieves rapid recombination equilibrium.

Key features of our recombinant TAT-Cre:

• Purified from E. coli with N-terminal 6×His tag, TAT peptide (GRKKRRQRRRPPAGTSVSL), and NLS sequence (PKKKRKV)
• Demonstrated 80-100% recombination efficiency in HEK293T reporter cells at 1 μM concentration
• Superior transduction efficiency compared to other Cre variants (HNC, TCH6, HC, HNCM, CH)
• 60-90% cell transduction within 1-2 hours (enhanced by 100 μM chloroquine)

Common research applications:

• Conditional gene knockout/knockin in floxed systems
• Tissue-specific or inducible gene manipulation (e.g., Cre-ER^T2 systems with tamoxifen)
• Vector engineering through loxP site recombination

Concentration calculator: http://www.excellgen.com/pub/mw_2_moles.html

• In vitro loxP recombination for molecular cloning
• Ex vivo transduction of cultured cells (including stem cells)
• Generation of tissue-specific or inducible knockout models

• Concentration: 2, 5, or 10 mg/mL
• Molecular Weight: 43 kDa
• Purity: >98% (SDS-PAGE and HPLC)
• Endotoxin: <0.1 EU/μg
• Activity: Induces 80-100% recombination in HEK293T reporter cells at 1 μM

Figure 1: Recombination timeline (0: pre-treatment; 1-5: days post-transduction)

• 2 years at -80°C
• 6 months at -20°C
• 3 weeks at 4°C

1. Ryder E, Doe B, Gleeson D, Houghton R, Dalvi P, Grau E, Habib B, Miklejewska E, Newman S, Sethi D, Sinclair C, Vyas S, Wardle-Jones H, et al. (2014) Rapid conversion of EUCOMM/KOMP-CSD alleles in mouse embryos using a cell-permeable Cre recombinase. Transgenic Res 23:177-185. doi:10.1007/s11248-013-9764-x
2. Bao X, Lian X, Hacker TA, Schmuck EG, Qian T, Bhute VJ, Han T, Shi M, Drowley L, Plowright A, Wang QD, Goumans MJ, Palecek SP (2016) Long-term self-renewing human epicardial cells generated from pluripotent stem cells under defined xeno-free conditions. Nat Biomed Eng 1:0003. doi:10.1038/s41551-016-0003
3. Phillips MJ, Capowski EE, Petersen A, Jansen AD, Barlow K, Edwards KL, Gamm DM (2018) Generation of a rod-specific NRL reporter line in human pluripotent stem cells. Sci Rep 8:2370. doi:10.1038/s41598-018-20813-3
4. Selvaraj S, Dhoke NR, Kiley J, Mateos-Aierdi AJ, Tungtur S, Mondragon-Gonzalez R, Killeen G, Oliveira VKP, López de Munain A, Perlingeiro RCR (2019) Gene Correction of LGMD2A Patient-Specific iPSCs for the Development of Targeted Autologous Cell Therapy. Mol Ther 27:2147-2157. doi:10.1016/j.ymthe.2019.08.011
5. Auderset L, Pitman KA, Cullen CL, Pepper RE, Taylor BV, Foa L, Young KM (2020) Low-Density Lipoprotein Receptor-Related Protein 1 (LRP1) Is a Negative Regulator of Oligodendrocyte Progenitor Cell Differentiation in the Adult Mouse Brain. Front Cell Dev Biol 8:564351. doi:10.3389/fcell.2020.564351
6. El-Nachef D, Shi K, Beussman KM, Martinez R, Regier MC, Everett GW, Murry CE, Stevens KR, Young JE, Sniadecki NJ, Davis J (2020) A Rainbow Reporter Tracks Single Cells and Reveals Heterogeneous Cellular Dynamics among Pluripotent Stem Cells and Their Differentiated Derivatives. Stem Cell Reports 15:226-241. doi:10.1016/j.stemcr.2020.06.005
7. Rohrbach A, Caron E, Dali R, Brunner M, Pasquettaz R, Kolotuev I, Santoni F, Thorens B, Langlet F (2021) Ablation of glucokinase-expressing tanycytes impacts energy balance and increases adiposity in mice. Mol Metab 53:101311. doi:10.1016/j.molmet.2021.101311
8. Schmidt V, Horváth CA, Dong H, Blüher M, Qvist P, Wolfrum C, Willnow TE (2021) SORLA is required for insulin-induced expansion of the adipocyte precursor pool in visceral fat. J Cell Biol 220:e202006058. doi:10.1083/jcb.202006058
9. Brunner M, Lopez-Rodriguez D, Estrada-Meza J, Dali R, Rohrbach A, Deglise T, Messina A, Thorens B, Santoni F, Langlet F (2024) Fasting induces metabolic switches and spatial redistributions of lipid processing and neuronal interactions in tanycytes. Nat Commun 15:6604. doi:10.1038/s41467-024-50913-w

Full reference list available in product datasheet