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	<id>https://eln.excellgen.com/index.php?action=history&amp;feed=atom&amp;title=Protein_Production_Enhancer_for_293_Cells</id>
	<title>Protein Production Enhancer for 293 Cells - Revision history</title>
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	<updated>2026-10-18T02:36:13Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://eln.excellgen.com/index.php?title=Protein_Production_Enhancer_for_293_Cells&amp;diff=19045&amp;oldid=prev</id>
		<title>Paul.xu at 19:01, 17 August 2018</title>
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		<updated>2018-08-17T19:01:55Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;HyClone SFM4HEK293 can substitute for the Invitrogen reagents with minimal loss of expression levels(10–20%).&lt;br /&gt;
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[https://www.sciencedirect.com/science/article/pii/S1046202313002673 https://www.sciencedirect.com/science/article/pii/S1046202313002673]&lt;br /&gt;
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&amp;lt;br/&amp;gt;cell cycle inhibitors, cyclin-dependent&amp;amp;nbsp;kinase inhibitor 1 (p21) and cyclin-dependent&amp;amp;nbsp;kinase inhibitor 1B (p27)&lt;br /&gt;
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For enhanced expression, the antibody expression plasmid(s)&amp;lt;br/&amp;gt;were cotransfected with the p33SVLT plasmid, p21 and p27 at a&amp;lt;br/&amp;gt;weight ratio of 0.69/0.01/0.05/0.25 (antibody plasmid(s)/&amp;lt;br/&amp;gt;p33SVLT/pORF-hp21/ pORF-hp27).&lt;br /&gt;
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A chemical inhibitor of caspases (caspase-3), z-VAD-fmk (Enzyme Systems Products),&amp;amp;nbsp; &amp;amp;nbsp;dissolve in DMSO to make a 100 mM (1000×) stock, add 4 ul to 60 mm dish containing 4 ml of culture 48 hours after transfection, and then add 4 ul every 24 hour. z-VAD-fmk has the effect of prolongation of cell viability.&lt;br /&gt;
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https://resources.rndsystems.com/pdfs/datasheets/fmk004.pdf&lt;br /&gt;
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Suramin protects against apoptosis during exponential growth, as indicated by the absence of DNA laddering and an increase in cell viability from roughly 70% to above 95%. Suramin also effectively dispersed cell aggregates so that single-cell suspension culture is possible. However, suramin does not protect against apoptosis during the death phase&lt;br /&gt;
[[Category:Antibodies]]&lt;/div&gt;</summary>
		<author><name>Paul.xu</name></author>
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