Is it normal to get higher cell activity in test during Cytotoxicity assay

I used CCk-8 kit (works on dehydogenase activity in viable cells) to do cytoxicity assay and I got higher absorbance (@450 nm, reference- 650 nm) for my tests than control (cells in microwell...

03 April 2016 8,631 2 View

For MTT assay, how do you select cell line?

11 December 2015 6,289 2 View

What are the merits/demerits in using S-nitroso human serum albumin for cancer treatment?

Thanks and regards Jitendra

11 December 2014 5,079 5 View

Why bacterial system is still used for protein production?

Why bacterial system is still used for protein production for some protein knowing that it doesn't have a system to support post translational modification?

11 December 2014 5,971 5 View

What could be the reason of getting a lawn of transformed cells on LB plate?

10 November 2014 4,636 4 View

What is the pI of a monoclonal antibody?

I was wondering if there is a fixed pI for all monoclonal antibodies as most of the labs use glycine and phosphate buffer systems for MAb isolation using Protein A-Affinity (in HPLC).

10 November 2014 4,700 3 View

What happens to the enzyme kinetics when in solution and when immobilized?

10 November 2014 3,400 15 View

Do epithelial cancer cells release nitric oxide?

If yes, then what effect does it impart?

09 October 2014 8,166 3 View

Why is it important to know the protein conc. accurately to know the protein structure using circular dichroism?

Thanks

09 October 2014 2,142 10 View

Has anyone ever tried something new during the plasmid isolation from bacteria cells which resulted in improved plasmid yield?

Has anyone ever tried something new during the plasmid isolation from bacteria cells which resulted in improved plasmid yield? Suggestions can cover centrifugation, changing the concentration of...

08 September 2014 9,297 7 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What's the concentration recommend for recombinant protein use in western blotting?

I'm currently working having problem with the concentration for recombinant protein use in western blot, the one been used is Recombinant Human CD19 Fc Chimera Protein-rndsystem which does not...

24 February 2021 8,514 3 View

Alginate and silk fibroin hydrogels toxic to cells?

Hello, I asm currently working with alginate and silk fibroin hydrogels. I prepared a blend of alginate and aqueous silk fibroin (straight from dialysis) and resorted to ionic crosslinking to...

23 February 2021 8,249 2 View

Will SARS-CoV-2 Spike be broken into S1 and S2 by denaturing conditions?

Hello, I am performing a western blot of my SARS-CoV-2 Spike-pseudotyped lentiviral particles. I denature my virus by adding concentrated virus to 2X Laemmli buffer at 1:1, then boiling for...

17 February 2021 4,844 4 View

How to dissolve lyophilized silk fibroin?

Dear members of the community, I am trying to concentrate silk fibroin to 25 % (w/v). Nevertheless, i am struggling with the concentration step. I successfully achieve concentrations of 5-6 % of...

16 February 2021 1,808 1 View

Kinetics of Enzyme production in Recombinant E Coli?

Hello, I am trying to find kinetic information (such as rate of enzyme production etc.) on the expression of taq polymerase in E-Coli after inserting a recombinant plasmid. Any help would be...

12 February 2021 1,386 3 View

Is it possible to quantify recombinant protein in the supernatant using SDS PAGE ?

I would like to quantify a recombinant protein (with native signal sequence) secreted by Pichia pastoris using the SDS PAGE. Since my standard protein (plant origin) is not pure, I would like to...

07 February 2021 3,880 9 View

How to measure the concentration of a labeled protein with no tryptophan or tyrosines?

Hey I'm trying to measure the concentration of a protein I've purified and then labeled with Atto 647 flourescent dye. The protein has no tryptophans or tyrosines (although does have...

04 February 2021 4,482 4 View

How to prepare protein samples in EMSA assay?

Recently l was studying EMSA assay, but l didn't find any detailed information about protein sample. we can use two kinds of protein, including crude protein extracts and recombinant proteins. but...

02 February 2021 10,047 3 View

Difference between assessing EC50 in presence of physiological levels of human serum albumin and alpha1 acid glycoprotein vs. % human serum?

01 February 2021 1,825 1 View