Does anyone know a protein marker which is only expressed after diauxic shift or in stationary phase in yeast?

Hello everyone, I am going to analyse some protein targets in stationary phase in some mutants. However, the mutants grow slowly, so I want to use some indicative proteins to determine the...

08 September 2015 7,542 2 View

How to dissolve polylysine?

Hello everyone, I wanna attach my cells on to the slide, so I used poly-lysine to coat the slide. I made poly-lysine solution in ddH2O with concentration was 1mg/ml and stored at -20oC. After...

01 February 2015 1,309 6 View

Express yeast protein in E. coli ?

Hello everyone. I want to express a yeast protein in E. coli. Should I have to optimize codon usage when express in E. coli? In case of a long gene, how can I optimize the codon usage? Thank you...

01 February 2015 1,674 0 View

Is it difficult to express small recombinant protein in E. coli?

31 December 2014 6,670 6 View

Should I insert a simple peptide between GFP and target protein?

Dear everyone, I want to tagged GFP to my target protein. Do I have to insert a simple peptide such as GGGG between GFP and the protein? And how many amino acids is enough? Thanks you so much.

11 December 2014 7,104 8 View

Do you know where to get information about the yeast backgrounds?

Hi everyone, I am working with BY4741 background but it seem to be not working well. So I want to change to another background such as CML128,... But I do not know much about the other backgrounds...

11 December 2014 1,414 0 View

I'm making the trypsin 0.25% solution for cell culture. The recipe is 2.5g trypsin and 0.2g EDTA.4Na in 1l HBSS 1x. My lab only has EDTA.2Na. How can I change EDTA.4Na to EDTA.2Na?

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04 May 2013 6,078 9 View

Why does blocking with my immunogenic peptide cause nuclear fluorescence in ICC?

Hi all, I am validating a polyclonal antibody raised against human ANT4, through WB and ICC. In most of my controls, the antibody shows very little off-target binding, but when I pre-incubate the...

03 March 2021 5,999 3 View

Does Napabucasin soluble in dichloromethane and in ethanol?

I need to prepare a solution of Napabucasin (inhibitor of cancer cell stemness) in dichloromethane. The drug is expensive, so maybe somebody already tried to do it. If it is soluble, what is the...

02 March 2021 9,945 3 View

Help request in CST microwave?

im working now on TPV solar cells and metamaterials and i realy need our help in CST microwave i have a tpv cell simulation and i want to extract particullarly the absorbtion of only the active...

02 March 2021 2,246 2 View

Why might my GFP tag be dissociating from my plasmid after transfection?

I have a set of stably transfected cell lines all transfected with plasmids containing GFP tags on the C terminus. During a western blot using anti-GFP antibody, one of my plasmids has dissociated...

01 March 2021 9,310 4 View

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 View

What is the most suitable server for predicting protein structures in bacteria?

I have used the i-Tasser several times, however it has been unavailable for several days. I tried the swiss-model, but the output was not very pleasant due to the model used. Is there any other...

28 February 2021 4,521 3 View

Do you need the CMV enhancer before the CMV promotor for a proper function of CMV on the gene that follows?

I'm a student and I have to produce a cell line with a knockin for the NRF2 gene with GFP. I have to put a promotor in front of the GFP because the gene will be too far away from the promotor of...

28 February 2021 7,127 2 View

Are protein samples in SDS compatible with ELISA?

I have used an AllPrep DNA/RNA/Protein Mini Kit QIAGEN kit to extract RNA and protein from my samples. At the end of the protein purification, I resuspend my protein in 5% SDS. Will these samples...

28 February 2021 7,370 3 View

RIA. How to measure?

When you use RIA, with a control the unknown sample with antibodies, you bare in mind the binding sites of the antibodies. However you still need to measure labelled antigen (radioactive) and not...

28 February 2021 2,133 3 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View