I'm getting "Fatal error: Residue 'UNK' not found in residue topology database." how to rectify?

I've a new ligand and named it as 'UNK' in pdb file. While generating the ligand topology through GROMACS by following its protein-ligand tutorial. I'm getting this fatal error: " Residue 'UNK'...

01 January 2020 5,498 10 View

What should be the Protein concentration for assays?

for CAT activity, is there is any threshold regarding the concentration of protein in the enzyme has to be taken into consideration before doing the experiment.

07 March 2019 3,109 5 View

Why is in situ hybridisation preferred over immunohistochemistry in paraffin embedded mouse embryo sections?

I am trying to characterize early embryos and most literature I have read seems to prefer in situ hybridization over immunohistochemistry to study expression profiles of different proteins. Does...

13 November 2018 8,911 1 View

How can we perform the urease and nitrate tests for an alkalibacterium that grows only above pH 8?

The protocols available are optimised at ph 6.8 to 7.

07 September 2017 8,796 2 View

How to calculate Molarity ?

02 April 2017 7,315 8 View

Precipitation of DNA ?

For the precipitation of DNA during extraction protocol, which is preferred, among isopropanol and isoamylalcohol and what is the underlying reason to select it ?

01 January 1970 5,072 3 View

Preparation of Riboflavin solution for SOD activity

During the in-gel activity staining of SOD, Riboflavin is used in the concentration of 28-30micromolar. As per the literature/protocols, the preparation of the riboflavin solution is in 50mM...

01 January 1970 8,317 2 View

ROS assay quantification

I have done a ROS assay using DCFDA (Sigma #D688) in a lung cancer cell line by using a microplate reader at Ex/EM 480/530. I am looking to get the quantification of the data, is there any formula...

01 January 1970 3,567 3 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Should we change media after1st 6hrs after plating HUVEC bought from INVITROGEN?it's not recomended by invitrogen.Will DMSO present in stock matter?

We have HUVEC bought from Invitrogen. Cat no -C-003-5c. while first plating the cells we have bought the protocol suggests not to centrifuge the cell with media to remove the DMSO. Should we...

02 March 2021 3,713 2 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Benefits of the 24 welled plate?

We have always used the 96 welled plate, the 48 welled plate but apparently there is much evidence on the 24 welled plate and above all its benefits.It states it is the same you would use on ELISA...

28 February 2021 1,149 1 View

Is there any published or unpublished statistics on dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, US, UK or any other country?

Are there any published or unpublished statistics or papers on the dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, USA, UK, or any other country where vaccination has started at...

28 February 2021 4,237 1 View

Can bacterial suspension be pipetted directly onto petri dish and agar poured onto it?

Hi, recently I encountered a protocol for plating which was not the usual method I have been practicing (pour LB agar onto plate, allow it to solidify, pipette bacterial suspension onto plate,...

28 February 2021 7,292 3 View

What is the best surface to culture cells isolated from a skin biopsy?

Hello, recently I am having some difficulties with maintaining the cell culture of primary cells isolated from a skin biopsy (normal and malignant). The coating of culture plates with Matrigel (a...

26 February 2021 6,151 2 View

Difficulty in cloning of 1kb gene into vector?

I am facing difficulties in cloning a 1kb gene into a vector (pJIT163). I have my gene on interest (GOI) in pUC57 and want to clone in pJIT163 using SalI and BamHI restriction sites. I am getting...

25 February 2021 3,221 7 View