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Introduction to Maxocc web portal
Maximum Occurrence (MaxOcc) refers to a method for making rigorous numerical assessments about the maximum percent of time that a conformer of a flexible macromolecule can exist and still be compatible with the experimental data. Maximum Occurrence of a conformer is defined as the maximum weight that it can have in one ensemble that matches the average experimental data. To evaluate the Maximum Occurrence, an ensemble is sought so that the conformation under investigation is contained up to a certain value. At the Maximum Occurrence, no solution will be found fulfilling both the requisites of containing the desired conformation and of being compatible with the experimental data. Such process is exemplified in figure: the four boxes represent 4 different ensembles, containing the desired conformation (represented as a red star) at different weight (represented by the dimension of the red star): the fourth one is no more compatible with the experimental data.

Reference for use of the MaxOcc server:
Journal of Biomolecular NMR, 2012
MaxOcc: a web portal for maximum occurrence analysis
Ivano Bertini, Lucio Ferella, Claudio Luchinat, Giacomo Parigi, Maxim V. Petoukhov, Enrico Eavera, Antonio Rosato, Dmitri I. Svergun
PMID:22639196 doi:10.1021/ja1063923

J Am Chem Soc. 2010 Sep 7.
Conformational Space of Flexible Biological Macromolecules from Average Data.
Bertini I, Giachetti A, Luchinat C, Parigi G, Petoukhov MV, Pierattelli R, Ravera E, Svergun DI.
PMID:20822180 doi:10.1021/ja1063923

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