I want to measure the amount of free Cys after reduction by DTT by Ellman assay. is there any possibility of measuring absorbance (412 nm) by nanodrop one instrument? 96 well plate ELISA reader can consider an option for that?
Yes, you can use microplate reader. It is so fast and practical.
I want to predict the DAR ratio based on the number of cys available for conjugation to Cys residue. I use Ellman's assay to predict the concentration of Cys after TCEP reduction. I gain a...
02 July 2024 612 6 View
I want to determine the conjugated drug to IgG ratio by nanodrop. I know the extinction coefficient of IgG and drug by M-1cm-1 but all the unit in the nandrop program is based on g/ml and so on...
15 May 2024 9,097 4 View
I had a BL21 (DE3) cell which I always use to express GFP protein which fused to a coil. Based on the vector map given to me, this gene is inside the pQE80 vector which has resistance to...
14 December 2020 4,709 4 View
I tried to express my protein in BL21(DE3) bacteria. The desired protein MW is 65.5 KDa and I know my protein will be in an insoluble form (inclusion body). I separate soluble and insoluble...
20 October 2020 4,322 8 View
I want to investigate the interaction between two proteins by ITC. I choose two proteins that I'm sure don't interact with each other as a control. but ITC results show there is some interaction...
22 June 2020 2,410 5 View
during immobilization of enzyme on support, for example activated chitosan with glutaraldehyde, which surface residue of enzyme molecule intracte with support?
07 August 2015 7,291 9 View
When we have two forms of As in an environment, how and in which potential does the reduction of As+3 to As0 occur, and the interference of As+5 form is zero?
15 February 2015 832 3 View
I want to show the effect of some detergent on enzymatic activity in immobilized form and free form. The data shows that I get different results. Tritton has bad effect on immobilized form(as...
08 January 2015 7,035 14 View
I immobilize enzyme on chitosan macrobead with Glutaraldehyde as crosslinker. I want to know how FTIR confirm immobilization? Which wavelength is related to chitosan with glutaraldeyde and which...
05 January 2015 4,274 9 View
I want to clone a gene in a vector with His-tag. My protein is an enzyme and its active site is in the center. Is there any difference between adding an His-tag at the C-er or N-ter of the protein?
04 January 2015 9,462 4 View
I am currently working on LncRNA; to know the lncRNA-protein interactions I want to do RNA pull down assay, so I need to design primers with T7 promoter. I need assistance in this regard.
07 August 2024 6,622 1 View
I am experimenting with cancer and non-cancer cells in a 12-well plate for 4 days with a seeding density 1*10^4/well, however, I noticed that the control group growth rate slows down on D3. Should...
07 August 2024 2,283 2 View
Hi, I have a question about normalizing the MTT OD values for doing the statistical analysis. So, if we have 3 different plates and we call them 3 different replicates, so, first we would...
07 August 2024 8,106 4 View
Hi all! My thesis groupmates and I are working on purifying an E. coli bacteriophage. The phage was handed down to us by the previous thesis group, but they only managed to purify it to about...
06 August 2024 5,801 4 View
I have been performing short phagocytosis experiments using 96-round bottom, tissue culture treated, well plates (Falcon, 353077). I culture the cells with the phagocytic cargo for 2-4hrs, wash...
04 August 2024 5,228 4 View
In my study, I intend to infect PBMCs with SARS-CoV-2. After that, I will analyze NK cells by flow cytometry to see if their phenotype changes or if they show degranulation. After the infection, I...
01 August 2024 4,403 4 View
Dear researchers, Today, we found this object in one of the wells of a 96wp culture plate. The plate contained MEC-1 cells and GelTrex. I am quite curious what this is (because it's not cells). Do...
01 August 2024 2,250 2 View
Does anybody know of entomological Journals without page charges that would publish an extensive checklist (Hong Kong Aculeates wasps) covering 350 species (of which more than half are new to Hong...
01 August 2024 6,134 2 View
I'm fairly new to making homemade comp cells and have done so with some mild success. What is generally an acceptable way of resuspending comp cells during wash steps? I've been told to swirl the...
31 July 2024 8,309 0 View
I am developing an ELISA kit for rotavirus A (G1P8 and G1P6). Does anyone know the weight (ng) of these two strains? Or to help me find their weight?
29 July 2024 3,138 2 View