Noha G Mohamed

19 Questions 26 Answers 0 Followers

Questions related from Noha G Mohamed

What is the role of sodium acetate in acetylation of primary amine with acetic anhydride?

i want know the role of sodium acetate in the acetylation of primary aromatic amine using acetic anhydride. the reaction mechanism doesn't explain it.

05 May 2021 9,805 5 View

How can i make docking of two proteins using Autodock ?

I want to make docking using Autodock and both receptor and ligand are proteins. i followed the usual steps of docking small molecule ligand but when I reach to docking step, an error message says...

31 July 2020 4,106 9 View

What is the best free program for the analysis of H-NMR spectrum?

I need a free program to analyze H-NMR spectrum. Any recommendations?

30 May 2020 1,724 2 View

What is the use of "set up covalent map" option in docking with autodock and how to choose the correct atom?

Hello All im trying to make docking using autodock and i have two questions 1 - i want know what is the use of "set up covalent map" option and how i select the proper atom? 2 - when i compare...

18 September 2018 4,963 0 View

How to view / show enzyme - drug interactions other than through hydrogen bond in Pymol?

I want to use Pymol to view an enzyme - drug interactions. i could only view the hydrogen bonds but how can i vew other types of interactions like hydrophobic, metal bonds and ion - water bridge?

24 July 2018 2,292 7 View

The autogrid step in Autodock 4.2.3 is not working and shows an error message. How can i overcome this?

Hello im trying to make docking with autodock 4.2.3 and the autogrid command always show error message saying ( C:\Windows\system32\autogrid4.exe: ERROR: Grid data file needs the extension...

17 April 2018 8,145 10 View

Im trying to make docking using MOE program but the rmsd value of validation was higher than 2 should i change the enzyme complex or the program ?

I want to make high throughput screening by MOE and when i made the validation, RMSD value was very high. I changed the following parameters: Placement, rescoring1, refinement and rescoring2 and...

21 February 2018 1,295 4 View

When should i use Rigid Protein Docking and when i use Induced Fit Docking?

Rigid protein docking deals with the protein / receptor as rigid structure while in induced fit docking receptor sidechains are allowed to flex during refinement of the poses when should i use...

15 December 2017 6,748 2 View

How can i make acylation for a secondary amine compound contains NH, phenolic OH and caroboxylic group?

Use of acid chloride will make esterification too. if there is a way to breake the ester and maintain the amide please recommend it.

03 September 2017 5,131 9 View

What is the proper conditions ( solvent, catalyst and temperature ) to react primary aromatic amine with nicotinoyl chloride hydrochloride ?

Reflux in pyridine (as reported) or in dioxane (using few drops of pyridine or sodium carbonate as catalyst) was not successful

11 November 2015 8,860 4 View

What are the new enzyme targets for Tuberculosis ?

i need to know the new enzyme targets of Mycobacterium Tuberculosis and the compounds and/or drugs acting on them

30 March 2015 9,718 2 View

How do I make schiff base derivative from 5-substituted 3-amino1,2,4-triazole?

Reflux alcoholic solution of 5-substituted 3-amino1,2,4-triazole with benzaldehyde or 4-chloro benzaldehyde using acidic catalyst (glacial acetic acid or HCl or H2SO4) for 12 hours not give any...

09 February 2015 4,022 21 View

How can I synthesize of amino triazole?

Im trying to synthesize naphthyridinyl amino triazole from naphthyridinyl hydrazide by reaction with S-methylisothiourea sulfate and sodium hydroxide but the preciptated product have same RF of...

27 July 2014 9,924 3 View

How can I separate nalidixic acid methyl ester from a mixture containing ester and acid (Nalidixic acid)?

The mixture contains nalidixic acid dissolved in chloroform then triethylamine and ethyl chloroformate were added and stirred for 30 minutes. Methanol was added to synthesize methyl ester. How to...

11 February 2013 3,191 8 View

How can I introduce Br atom into naphthyridine ring of nalidixic acid

Bromination of nalidixic acid

12 January 2013 6,949 0 View

Some stable conformers do not bind to the receptor. Other less stable conformers bind well to the receptor. Which conformers should I use when analyzing MOE docking results?

Analyze MOE docking results

02 January 2013 1,988 5 View

I need to make homology modelling by MOE and all protein sequences are in fasta format not pdb any one can help?

Convert fasta to pdb

30 December 2012 2,112 1 View

How can I find a molecular model for ATP synthase of mycobacteria to make docking on MOE program ? It's not available on protein data bank.

Docking of ATP synthase of mycobacteria

19 December 2012 3,731 16 View

How can i differentiate between E and Z isomers of imine?

i synthesized aromatic schiff base from 3-aryl-5-amino 1,2,4-triazol. How can i know it is E or Z using another tool than X ray crystallography.

01 January 1970 3,174 6 View