Fourth, for this experiment it is not necessary to have strict fold-change or p-value cutoffs, so that a wider range of gene changes can be identified.
Accordingly, using strict fold-change or p-value cutoffs might not have the required sensitivity to detect important gene changes in the nontarget tissue.
6 A strict fold-change or P value cutoff is needed to obtain the regulated gene list, but the choice of the cutoff is often arbitrary and can have a significant influence on the test outcome and, subsequently, the interpretation of an experiment.
Initially, strict three-fold non-crystallographic symmetry (NCS) was applied to refine the catalytic ring structure (Rrp41/42 heterotrimer) but was dropped when refinement can no longer improve the model and Rfree.
All training was based on a strict 10-fold cross-validation.
The structure was refined with a strict 16-fold NCS protocol in CNS (Brunger et al., 1998; Brunger, 2007) and manually improved with Coot (Emsley and Cowtan, 2004).
To systematically detect miRNAs that are differentially expressed between tissues, we applied a strict (5-fold) expression level difference that had to apply for each of the two strains.
Using a strict 10-fold cross-validation, the classification capacity of cancer hub gene signatures proved to be significantly better than random predictability (Additional file 4: Figure S1A-S1D for second supporting information figure, p <10−6, AUC = 0.72 ~ 0.85).
Using the penalized logistic regression via the elastic-net, a classification model was built, and its discriminatory capacity was first estimated with a strict 10-fold cross-validation methodology (as described in Additional file 1: Materials and Methods).
The structure was subjected to coordinate and group B-factor refinement with strict 16-fold NCS in CNS (Brunger et al., 1998; Brunger, 2007) to yield the final model.
There are two further O2– ions that give Al O = 2.69 Å and 2.80 Å, thus being 0.46 Å and 0.57 Å longer compared to the longest bond in strict 4-fold coordination.
