41 Questions 13 Answers 0 Followers
Questions related from Suipwksiow Wjkp
The antibody is against human protein, but with mouse IgG (as it is generated in mouse). Before totally humanizing it (which takes a lot of money and time), I want to validate its function in...
21 April 2022 9,883 0 View
Hi Everyone, I'm exploring the anti-tumor effect of some drugs. I'd like to test some FDA-approved drugs which are not used to treat cancer. My question is, if there is any anti-tumor effect for...
15 December 2020 1,563 1 View
Hi Everyone, I did numerous human T cell CFSE proliferation assays, but the peaks never shift. I put CD3/CD28 and IL2, and I can see that T cells did proliferate by my eyes (as there was increase...
09 December 2020 9,200 3 View
Hi everyone, The protein I studied is a membrane protein. Some study indicates that there is possibility that this protein can form a dimer. I did standard western blot for this protein and my...
21 October 2020 7,053 7 View
Hi all, My hypothesis is that CD99 binds to CD88 (two membrane proteins). My colleagues suggested me to do co-IP, but I don't have good western blot antibody against one of the protein. However,...
15 October 2020 9,333 6 View
I'm recently buying some anti-CD3 and anti-CD28 to activate T cells. I also notice some of this clones have been conjugated with fluorescence for the purpose of labeling T cells for flow...
07 October 2019 7,250 3 View
I have many single-cell sequencing data. I checked my gene of interest in these data. However, all of these single-cell sequencing data showed that my gene has no expression, no matter in immune...
04 January 2019 1,796 3 View
I was doing an over-expression experiment of a gene for a year. It is a surface protein. The biggest trouble is that I can never detect the gene overexpression by western blot. Interestingly, when...
30 November 2018 6,397 3 View
For CRISPR, transfection or transduction? The CRISPR vectors I bought is lenti vector, so I can either do transfection or transduction. But which is better??
14 March 2018 4,534 3 View
Can I use NEB mutagenesis -- substitution method to clone sgRNA into the vector? I felt it's much easier. Just design the primers containing the sgRNA bp, conduct PCR and do a ligation. And most...
09 March 2018 5,086 1 View
Is it possible that patients that got gene therapy may pass the engineered genes to their next generation? e.g, the virus gene therapy, deliver some genes to human body. Will the human pass some...
24 February 2018 2,471 3 View
I know Lenti vector is usually used for making virus and doing transduction. But can I use it for transfection??? Thanks
22 February 2018 5,663 4 View
Recently check the cell lines, 60% of the cell lines are infected with Mycoplasma. Some common antibiotics for treating Mycoplasma were used to treat cells for 3 weeks, but mycoplasma is still...
15 February 2018 9,601 2 View
The growth instruction for a CRISPR plasmid said that the plasmid need RecA negative E.coli strain like Stbl3 to grow. What is special for RecA negative strain? Why the clone need RecA negative??
20 January 2018 5,156 6 View
I'd like to analyze the RNA level of TCGA data. However, there are two categories of the data One is harmonized data, under this, you can choose the category of "transcriptome Profiling", and...
04 January 2018 689 4 View
I have CHO cells that transduced with two vectors expressing light chain and heavy chain of an antibody respectively. How do they automatically associate with each other and form antibody? What...
28 December 2017 5,749 4 View
Among anti-CD3, CD28, OX40, 41BB, which is better to be bound antibody and which is better to be secreted antibody in order to stimulate T cells? And why there is such a difference of function...
15 December 2017 3,410 1 View
When I treat mice with two immune checkpoint blockades (release two breaks at the same time), it looks that the combination treatment is very toxic to mice, which seems due to the cytokine storm....
20 November 2017 424 1 View
I used 26 gauge needle for subcutaneous injection of matrigel:cancer cells. However, when i pull out the needle, the matrigel solution also came out. How to prevent the leaking?
13 November 2017 5,567 3 View
There are many problems with drug infiltration when using i.p./i.v. injection, because tumor has ECM outside and less vascular inside. For drugs that can directly function on tumor cells instead...
26 October 2017 5,444 1 View
There are so many researchers developing inhibitors for tumor. For those tumor that has a single and specific shape, what is the main treatment? Isn't the tumor removal surgery much more faster...
26 October 2017 2,346 3 View
There is orthotopic injection of 4T1 into mammary fat pad, there is also subcutaneous injection to the mammary region. I also see people use 4T1-luc for i.v tail injection(I don't have 4T1-luc...
23 October 2017 9,283 1 View
It looks that some of my cell lines show two bands for vinculin on WB. The two bands are very close to each other, and they are on the right MW. I washed the cells with PBS for several times, so...
25 September 2017 2,974 2 View
I'd like to fuse 3 fragments into a vector, but they have RE sites. How to connect them together without adding extra space? I don't wanna additional a.a to be translated.
22 September 2017 5,086 3 View
I want to study a immunosuppressive gene. I knock it out in a cancer cell line and transplant it into B6, and compare its growth with WT tumor. I would expect that KO tumor grow slower than the...
18 September 2017 9,403 1 View
I've never done Luminex assay but only ELISA. Why do some people use Luminex assay but not ELISA to detect cytokines in supernatent? What is the advantages of Luminex assay?
18 September 2017 5,819 3 View
How to design the primer for Sanger sequencing? I'd like to know the sequence of a 2kb inserts. Is there anything special that should be noticed? From primer to the interested sequence, how many...
08 September 2017 2,749 5 View
I'd like to do a lenti-virus transduction as soon as possible. Is it OK to thaw cells , directly plate them into 6-well plate, and after overnight, do the transduction?
01 September 2017 9,152 3 View
I first digested two vectors (the vector containing my interested gene and the destination vector). I ran on gel, cut the band, and did gel extraction. Then I incubate the inserts with the...
07 August 2017 7,841 8 View
I'm analyzing TCGA data. I'm comparing a gene's expression between tumor and normal. However, it is possible that the patients get any treatment before, which affect the genes expression. How to...
20 July 2017 646 2 View
Why use special competent E.coli for gateway plasmid clone? What's the difference between the gateway competent E.coli with normal competent E.coli?
10 July 2017 8,091 2 View
I have a list of genes ranked according to their expression. I want to know which gene encodes transcription factor. I cannot search one by one, because there are too many genes. Any suggestions...
27 June 2017 1,934 5 View
Mutant kras leads to constitutive activation of downstream factors, what if we directly delete Kras in the tumor tissue? Will there be tumor regression? Also, people don't target KRAS is because...
23 June 2017 4,588 4 View
Can a gene's regulatory region overlap with another gene? I'm looking for promoter region of a gene. If I take 1kb upstream of TSS, the sequence will overlap with an upstream gene. Should I take...
14 June 2017 2,727 6 View
It is known that immunogen should be foreign to the host. e.g. if the immunogen(the peptide) is from mouse, then the host should be rabbit. However, if I use rabbit as host to produce antibody...
01 June 2017 3,156 4 View
It is known that 293T constitutively express SV40 large T antigen, which can bind to SV40 enhancers. Does that mean that SV40 promoter is the best promoter in 293T cell?
31 May 2017 6,289 4 View
Is EMT cancer-type-specific? Or does EMT occur in all kinds of tumor? I'm curious how specific the EMT signature is among different types of cancer. Is there any cancer type that EMT prefer? Thx
23 May 2017 4,789 3 View
Is there any way to control MHC 1/2 presentation? To let it present my desired peptide?
18 May 2017 5,599 3 View
i've been doing bio research for many years. but in terms of physics and philosophy, i'm pretty confused why proteins function. e.g., why does endonuclease know to cut DNA? What is the force to...
25 April 2017 5,725 5 View
I have a strain of bacteria. it's just a common bacteria without any genetic engineering or other processing. The instruction said that it can grow in normal LB broth. But I just worried if there...
06 April 2017 3,780 4 View
We all use anti-PD1 or anti-CTLA4 to release the brake of immune response. And we all know that CD3/28 activator can always help T cell expansion and activation. So, why don't we use anti-CD3/28...
01 January 1970 6,729 1 View
