Glenn P Johnson
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Explore the profile of Glenn P Johnson including associated specialties, affiliations and a list of published articles.
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17
Citations
121
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Recent Articles
1.
French A, Johnson G
Methods Mol Biol
. 2020 Jul;
2149:513-539.
PMID: 32617954
Computerized molecular modeling continues to increase in capability and applicability to carbohydrates. This chapter covers nomenclature and conformational aspects of carbohydrates, perhaps of greater use to computational chemists who do...
2.
Santiago Cintron M, Johnson G, French A
Carbohydr Res
. 2017 Apr;
443-444:87-94.
PMID: 28411418
The interaction of two methanol molecules, simplified models of carbohydrates and cellulose, was examined using a variety of quantum mechanics (QM) levels of theory. Energy plots for hydrogen bonding distance...
3.
Csonka G, French A, Johnson G, Stortz C
J Chem Theory Comput
. 2015 Nov;
5(4):679-92.
PMID: 26609572
Correlated ab initio wave function calculations using MP2/aug-cc-pVTZ model chemistry have been performed for three test sets of gas phase saccharide conformations to provide reference values for their relative energies....
4.
French A, Johnson G, Cramer C, Csonka G
Carbohydr Res
. 2012 Jan;
350:68-76.
PMID: 22265378
Adiabatic Φ/ψ maps for cellobiose were prepared with B3LYP density functional theory. A mixed basis set was used for minimization, followed with 6-31+G(d) single-point calculations, with and without SMD continuum...
5.
French A, Johnson G
Methods Mol Biol
. 2011 Jan;
715:21-42.
PMID: 21222074
Computerized molecular modeling continues to increase in capability and applicability to carbohydrates. This chapter covers nomenclature and conformational aspects of carbohydrates, perhaps of greater use to carbohydrate-inexperienced computational chemists. Its...
6.
Stevens E, Dowd M, Johnson G, French A
Carbohydr Res
. 2010 Apr;
345(10):1469-81.
PMID: 20381017
alpha,alpha-Trehalose is of interest because of its cryoprotective and antidessicant properties, and because it possesses various technical anomalies such as (13)C NMR spectra that give misleading indications of intramolecular structural...
7.
Shen T, Langan P, French A, Johnson G, Gnanakaran S
J Am Chem Soc
. 2009 Oct;
131(41):14786-94.
PMID: 19824731
Structures, dynamics, and stabilities of different sized cellulosic oligomers need to be considered when designing enzymatic cocktails for the conversion of biomass to biofuels since they can be both productive...
8.
Stortz C, Johnson G, French A, Csonka G
Carbohydr Res
. 2009 Sep;
344(16):2217-28.
PMID: 19758584
Eighteen empirical force fields and the semi-empirical quantum method PM3CARB-1 were compared for studying beta-cellobiose, alpha-maltose, and alpha-galabiose [alpha-D-Galp-(1-->4)-alpha-D-Galp]. For each disaccharide, the energies of 54 conformers with differing hydroxymethyl,...
9.
Johnson G, Petersen L, French A, Reilly P
Carbohydr Res
. 2009 Sep;
344(16):2157-66.
PMID: 19733839
Patterns of scissile bond twisting have been found in crystal structures of glycoside hydrolases (GHs) that are complexed with substrates and inhibitors. To estimate the increased potential energy in the...
10.
Nishiyama Y, Johnson G, French A, Forsyth V, Langan P
Biomacromolecules
. 2008 Oct;
9(11):3133-40.
PMID: 18855441
In the crystal structure of cellulose I beta, disordered hydrogen bonding can be represented by the average of two mutually exclusive hydrogen bonding schemes that have been designated A and...