In this study, we developed temperature, and water content correction factors for methane oxidation parameters.
Here, the range III is used for the case 3, even when the equivalent N-value (after correction) with (N65)/0.5 is in the range I or II, because the results from the fines content correction are too conservative.
Other types of GC content correction algorithms have also been developed [ 24, 25].
However, only a small portion of genes is affected by the local normalization and GC content correction.
The pipeline comprised short reads alignment, GC content correction, fetal DNA concentration estimation, t-test of a binary hypothesis, and fetal gender classification.
The package includes novel methodology on (i) filtering, reducing false positives, and (ii) GC content correction, improving copy number profile quality, especially under great read coverage and high correlation between GC content and copy number.
The described relationship between GC content and RC [ 12] is generally non-linear, so, until recently, GC content correction has been tackled through local regression (LOESS) or polynomial fitting [ 10, 11, 26].
The package includes novel methodology on (i) window filtering, reducing false positives in comparison to assessed existing methods, and (ii) GC content correction, improving profile quality, especially under great read coverage and high correlation between GC content and copy number.
We implemented our own GC content correction using the approach described by Diskin and colleagues [ 13], modifying it slightly so the regions of high amplification/deletion were also included into the GC wave parameter estimation.
Potential improvements include alternative methods for variance stabilization transformations (in contrast to the log transformation used in this case) and other normalization methods, for example, GC content correction methods and scaling methods like Trimmed mean of M values.
