15 E. coli K12 Promoters Now Available on PeptiCloud

More Chris Lee's questions See All

Could you recommend some articles on Urban Transportation System optimization and Innovation?

13 August 2024 2,595 3 View

Does anyone know what might be causing the smeared bands on my western blot?

I got these smeared bands quite often lately. We typically run the gel at 140V with a 10-12% gel and do a wet transfer at 220 mA for 1.5 hr in cold room. We also noticed some dirty spots/dots (see...

10 August 2024 7,480 3 View

Fabrication of narrow glass capillary (inner diameter 200~500 nm)?

I need a very narrow glass capillary for my research. How can I make a glass capillary with an inner diameter of around 200 to 500 nanometers?

08 August 2024 8,915 0 View

How to back transform the results generated from analyses using log transformed with In(X+1) data?

I am conducting my analysis using SPSS. I log transformed my data using In(X+1) as my data contain zero values. However, when I want to back transform the regression coefficients generated from my...

31 July 2024 7,860 3 View

Is artifacts in XPS possible to build high deviation in binding energy larger than 5 eV??

Hello. Thanks for your consideration to see my question. Recently, I conducted XPS anaylsis of g-CN that is prepared from thermal polycondensation of DCDA, so-called conventional bulk-g-CN,...

30 July 2024 9,824 2 View

Why do some of my Raman spectra show no signal at lower Raman shifts?

I'm using a InVia Renishaw Raman microscope system (785nm wavelength, 600l/mm grating density) to acquire Raman images on human brain samples, at 50um resolution. The samples are placed on MgF2...

30 July 2024 8,771 3 View

Could you try using PeptiCloud and see if it's a useful tool for biology research?

PeptiCloud (www.pepticloud.com) is a bioinformatic platform that allows researchers to organize and share their data for their projects as well as collaborate with others in one place. Through...

28 July 2024 4,762 2 View

Are these cassettes suitable for expressing PETase mutant in E. coli?

I created two potential gene expression cassettes (constitutive and inducible) for expression of a mutant PETase gene on PeptiCloud using the version tree feature, which allows users to create...

28 July 2024 7,559 1 View

How can i solve the code problem in Sentaurus TCAD?

Currently, I have created a gate-all-around process using sentaurus tcad and I am trying to measure the noise using the cmos noise code. However, an error occurred during the simulation. The error...

24 July 2024 6,352 0 View

Can I detect the FLAG sequence of my AAV vector by qPCR?

I am treating human cells with an AAV vector encoding for my gene of interest tagged by FLAG. I want to quantify the mRNA expression of my gene of interest via qPCR to discriminate the endogenous...

14 July 2024 8,482 3 View

Can I base on reverse DNA sequences to perform alignment, convert to amino acids and GenBank submission?

I have reverse sequences (AB1 format), can I base on reverse DNA sequences to perform nucleotide alignment, convert nucleotides to amino acids and deposit the sequence in GenBank database?

11 August 2024 5,138 1 View

Geotechnical Engineering (Proceedings of the ICE) time review?

Hello everyone, I recently submitted an article to Geotechnical Engineering (Proceedings of the ICE), and the current status has been listed as "EiC Pre-assessment: Ready" for the past 20 days. I...

10 August 2024 6,493 1 View

How to confirm the site-directed mutagenesis result without performing NGS?

I'm cloning a fragment of 3200 nts into plasmid. The cloning was successful, however, 02 amino acids were mutated. Now I want to fix these 02 aa by site-directed mutagenesis technique using...

08 August 2024 4,645 2 View

I can't see the ssDNA band after performing asymmetric PCR. Is there any way to do this?

After performing symmetric PCR, PCR purification was performed. Afterwards, asymmetric PCR was performed using the PCR purification product as a template, but no ssDNA band was confirmed in the...

08 August 2024 1,668 3 View

Does crude extraction using NaOH and Tris work well with Fungi?

I'm trying to find a DNA extraction method for fungi that does not require equipment and heating. Is there anyone who can suggest an alternative option? Thank you

08 August 2024 4,733 2 View

Can I use a HisTRAP column for affinity chromatography?

I'm working on selecting antibodies against a recombinant protein that has a His-tag. My idea is to first bind the recombinant protein to a HisTRAP column and then use this column for an affinity...

07 August 2024 505 3 View

What precautions should be taken while handling S. aureus enterotoxin Type B in the lab?

I would like to understand potential safety concerns while handling SEB in the lab. Especially while working in animal house facility. Would like to know precautions for handling. Sigma MSDS...

07 August 2024 6,034 3 View

Why does my protein refolded to beta sheet during thermal denaturation analysis?

Hi! So i attempted to understand a novel protein behavior towards heat application by analyzing its secondary structure change. I subjected the protein to a thermal denaturation analysis using...

06 August 2024 1,989 3 View

Are there instances where molecules with larger molecular weights exhibit greater mobility than those with smaller molecular weights?

Hi, I know that low molecular weight (MW) molecules generally tend to have higher mobility, while high molecular weight molecules tend to have lower mobility. However, in my experimental...

06 August 2024 1,495 2 View

Weak DAPI staining after immunohistochemistry - how to improve?

After immunohistochemistry of previously fixed in PFA and EtOH and then frozen 20 μm sections of zebrafish brain, DAPI staining is very weak (right) compared to the same sections stained without...

05 August 2024 9,637 2 View