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OriGene proteins in recent publications

Fully functional proteins purified from transient TrueORF cDNA clone transfections.  Researchers purified GEN1 protein using anti-FLAG M2 affinity column and determined it resolved Holliday junction X0 efficiently in vitro, thus confirming GEN1 is human Holliday junction resolvase.

Identification of Holliday junction resolvases from humans and yeast, Stephen C. Y. Ip, Ulrich Rass, Miguel G. Blanco, Helen R. Flynn, J. Mark Skehel, Stephen C. West, Nature 456, 357 - 361 (20 Nov 2008), doi: 10.1038/nature07470,


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Product Specifications

Product Name: VERIFY?Antigen Standard (Transient Over-expression Cell Lysate)

Application: Antigen standard in Western blot, ELISA and other assays

Expression cell line: Human HEK293T cell line

Epitope tag: C-terminal Myc/DDK*

Plasmid: pCMV6-Entry vector

Components:
1 vial of 100 ug gene specific transient over-expression cell lysate
1 vial of 100 ug empty vector transfected control cell lysate

100 ug lysate is sufficient for 20~50 reactions. Depending on over-expression level and antibody affinity, some lysates can go as low as 0.1ug per load.

Preparation method:
HEK293T cells in 10-cm dishes were transiently transfected with MegaTran Transfection Reagent (TT200002) and 5ug TrueORF cDNA plasmid. Transfected cells were cultured for 48hrs before collection. The cells were lysed in modified RIPA buffer (25mM Tris-HCl pH7.6, 150mM NaCl, 1% NP-40, 1mM EDTA, 1xProteinase inhibitor cocktail mix (Sigma), 1mM PMSF and 1mM Na3VO4), and then centrifuged to clarify the lysate. Protein concentration was measured by BCA kit (Thermo Scientific Inc.). Cell lysates were aliquoted and stored at -20oC before shipping.

Storage:
The lysate is shipped with dry ice. Upon receiving, store the sample at -20oC. Lysate samples are stable for 12 months from date of receipt when stored at -20oC. Avoid repeated freeze-thaw cycles.

Lysate samples can be reconstituted with 2xSDS Sample Buffer provided. After reconstitution, the protein sample should be aliquoted and stored at -20oC for long term storage. Prior to SDS-PAGE fractionation, boil the lysate for 5 minutes.

Quality Control:
The transient over-expression cell lysates are validated with mouse monoclonal anti-myc antibody (TA100010) or anti-DDK antibody (TA100011). See "Validation Data"

In the rare case where over-expression cell lysates do not pass QC, OriGene will contact customers to provide alternative solutions.



* Peptide sequence of the DDK-tag (Flag®: N-DYKDDDDK-C . Flag® is a registered trademark of Sigma-Aldrich.
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