What is the reason for change in mRNA level of specific gene but not change in protein level?

With treatment of cell lines ( cardiofibroblast cells), changes in mRNA level of the gene of interest has been observed overtly, but there is no change in protein level. I am wondering how this...

07 August 2017 1,964 7 View

How can point mutation in a protein affect amount of other protein in cells?

It has shown that about gene knock out in mice'brain, the amount of other protein can be affected (Maybe in mRNA level or protein stability). I want to know whether point mutation can lead to the...

04 May 2017 3,735 4 View

Have anybody experience in taking special GRE in biochemistry?

I'm looking for a set of books that I can read in preparation for the GRE Subject Test In Biochemistry, Cell And Molecular Biology

08 September 2015 8,014 1 View

Can anybody introduce books in field of oncology?

I want to know oncology books that is comprehensive. I want to know from beginner to advanced. I need materials that is useful for molecular medicine major.

06 July 2015 8,964 3 View

Does rigidity structure of enzyme always lead to decrease enzyme activity?

Article show that rigidity affects enzyme activity and high rigidity causes low activity. Is there any exceptions? How does increasing rigidity cause high activity?

01 February 2015 9,685 11 View

What is the effect of immidazole on activity and stability of enzyme?

When enzymes were eluted with high concentration immidazole, some of them lost their activity in 2 days. I want to know how immidazole affect enzyme or other protein. I can't find article about that.

31 December 2014 8,559 7 View

How does the removal of a small domain from an enzyme affect the optimum PH of activity?

my enzyme is cellulase. It has two domains( small domain and catalytic domain). small domain has a few hydrophobic interaction with catalytic domain. I determined PH optimum for truncated and...

11 December 2014 8,513 4 View

How can I assay the aggregation of my enzyme?

I removed small domains from my enzyme. I want to know which one (truncated or wild-type) is more likely to aggregate at different times at 65 centigrade. Can you give me a strategy to go about...

11 December 2014 5,926 9 View

Why do truncated and wild-type enzyme have different colors in bradford assay with the same sharpness in SDS-PAGE?

I remove 85 aa from my enzyme(cellulase). I purified enzymes(truncated and wild-type). After dialysis, I run 20 microliter of them for SDS-PAGE. Both of them have the same sharpness on gel, but...

10 November 2014 7,843 4 View

Why did my protein elute with wash buffer (even 10 mM imidazole)?

I can't purify my protein with the ni-agarose column. The PH wash and elution buffer is ok but all of my protein eluted in the wash buffer. What is my problem?

09 October 2014 981 17 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before?

Question to you and THEM, the New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before? There appears to be a core problem for...

02 March 2021 3,024 2 View

Does anyone know HRM channel in a 2 plex QIAGEN Rotor- Gene Q qPCR can be used as a separate channel?

I am going to have 3 different probes in my qPCR work that I am going to do. But I realized that the machine we have in the lab is a Rotor-Gene Q 2plex HRM Platform, saying it has green, yellow,...

01 March 2021 8,544 1 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

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

Unknown debris sheets observed in cell culture flasks?

Hi, We culture neural progenitor cells in T175 culture flasks coated with PLO-Laminin. We have successfully grown these cells with our protocol for months. Recently, we observed large sheets...

25 February 2021 3,443 4 View

How to replicate the well conditions of a crystal hit with 20%(w/v) isopropanol?

I had a crystal hit in a well with 0.1M HEPEs pH 7.5, 10%(w/v) PEG 4000, and 20%(w/v) isopropanol. Why is isopropanol in w/v here if it's just solvent? How do I recreate this well condition?

25 February 2021 9,761 1 View

Standard curve shifting over time. How do I stabilise the ELISA?

24 February 2021 1,365 3 View

Can we recognize signs of the "volatility clustering" property of a time series in its time domain plot?

My purpose is to recognize the volatility clustering property without statistical tests such as The Lagrange Multiplier (LM) test.

24 February 2021 4,150 3 View

Can two EC50 values with different hill slopes be compared?

Hello, I fit a classical dose response curve Y=Bottom + (Top-Bottom)/(1+10^((LogEC-X)*HillSlope)) to my data (not related to inhibitors etc). The model I use is purely qualitative but it fits...

23 February 2021 8,155 5 View